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Topic: 5.0 to a 351 (Read 3962 times) previous topic - next topic

5.0 to a 351

well, after doing some searching, and discovering i might have a front main seal leak, or something to that effect, I have decided to look down the road of building an engine for the cougar. I did some preliminary research around here and on cool cats, along with a few other sites just gathering some information, and I had a few questions that I figured you guys would be able to answer.

If i do it, it will be fairly built, nothing out of the box/monstrous blower sticking out of the hood, but respectably done.

the general swap, will i need to swap the subframe? i know that the 302 has a split drain pan with two oil drain plugs, because it was too big to have a full pan.

are the bolt patterns fairly similar ie: can i use a 302 head on a 351 block? or are they considered the same thing. technically shouldnt the only real difference between the two blocks be maybe a different crankshaft with longer journal offsets, and larger piston bores? or am i out to lunch and they are completely different? I talked to a guy at a show i was at recently, and he said something about the 351 sitting higher in the engine bay, which would lead me to believe that its a bigger block entirely.

I think the best thing would be a comparison between the two blocks, if anyone knows where one is, it would be an immense help.

I also thought about making my life really easy and looked up a crate engine from ford...turns out I must have left my brain somewhere. they offer a 351 based engine...its a 427, for a paltry $9,249.00 to $13,595.00. in other words, Ill buy a bike before I buy a crate engine.

Thanks for the help...once again
1974 Cougar XR7, 351 C, stock. white leather.
1983 Coug' LS-XR7-1/ A/c Delete, Edlebrock Intake, Holley 600 4bbl, Custom Badging, True dual Glasspacks
1989 Pontiac Bonneville SSE, 3.8L bone stock winter beater, in Gold

5.0 to a 351

Reply #1 –
The 351  is a taller block . I had some comparison pics I'll see if I can find them
Fox-less at the moment

5.0 to a 351

Reply #2 –
A 351W will bolt down just like the 5.0.........You will need the Fox style double sump oil pan, headers, and the 5.0 motor mounts will swp over to the 351.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

5.0 to a 351

Reply #3 –
I used Chucks mounts and a motorsport double sump pan and BBK swap shorty headers with 1 5/8 primaries. I have a mild build and if you go big you should look at long tube headers with bigger primaries, the more power the more it will want to breathe.The 351 is wider and taller than a 302 something like an inch or a little more someone will probably chime in with exact #'s. I went with a performer intake and carb so as far as hood clearance with efi I cant help but I'm sure its been done
Good luck
[SIGPIC][/SIGPIC]:ford:87 Turbo Coupe through the floor sub frame connectors, 5.8 swap Ford racing heads Harland sharp 1.6 rockers BBK shorty swap headers 2 1/2 BBk X pipe magnaflow ler's. Megasquirt 2 with 36lbs injectors on hurricane intake with 4150 throttle body.Tremec TKO 600 Quicktime blowsheild spec stage 3 clutch. 3.73 gears and still not done

5.0 to a 351

Reply #4 –
......here ya go....hope it helps.

http://sbftech.com/index.php/topic,39.0/topicseen.html
84 COUGAR/90 HO, 1.7RRs, performer RPM,700DP, equal length shorties, stainless EXH ,T-5,Hurst pro-billet, KC clutch, 8.8/ 4.10s, line-lok, bla ,bla, bla.
71 COMET/289,351w heads, 12.5 TRWs, 750DP, Liberty TL, 9"/6.00s, 11.9x @112 , bla,bla,bla.

Never shoot your mouth off, unless your brain is loaded! ....I may get older, but I'll never grow up!....If you're not laughing, you're not living!  :laughing:

5.0 to a 351

Reply #5 –
wow that was a bomb shell of information! once again you guys pull through like no tomorrow! one thing i noticed reading was this:
"2) Get new motor mounts. If your mounts are questionable already, the additional weight of the 351W will make them fail in a hurry. I recommend the 87-93 convertable mounts, which will work in any 79-93 Mustang. "

now thewestie mentioned chucks mounts, and the article said buy new ones... could that be new 302 mounts, or could i/do i have to go up to a 351 mount... if they're made, or would a better choice be talking with chuck w?
1974 Cougar XR7, 351 C, stock. white leather.
1983 Coug' LS-XR7-1/ A/c Delete, Edlebrock Intake, Holley 600 4bbl, Custom Badging, True dual Glasspacks
1989 Pontiac Bonneville SSE, 3.8L bone stock winter beater, in Gold
 

5.0 to a 351

Reply #6 –
I have a different k frame from a 83 the 87 88 k frame uses a different mount I think the 83 can use mustang mount ? There will be more info soon
[SIGPIC][/SIGPIC]:ford:87 Turbo Coupe through the floor sub frame connectors, 5.8 swap Ford racing heads Harland sharp 1.6 rockers BBK shorty swap headers 2 1/2 BBk X pipe magnaflow ler's. Megasquirt 2 with 36lbs injectors on hurricane intake with 4150 throttle body.Tremec TKO 600 Quicktime blowsheild spec stage 3 clutch. 3.73 gears and still not done

5.0 to a 351

Reply #7 –
Quote from: Coldcougar;362467
wow that was a bomb shell of information! once again you guys pull through like no tomorrow! one thing i noticed reading was this:
"2) Get new motor mounts. If your mounts are questionable already, the additional weight of the 351W will make them fail in a hurry. I recommend the 87-93 convertable mounts, which will work in any 79-93 Mustang. "

now thewestie mentioned chucks mounts, and the article said buy new ones... could that be new 302 mounts, or could i/do i have to go up to a 351 mount... if they're made, or would a better choice be talking with chuck w?
  I personally can't speak for Chuck's mounts, but everything I've read about them points to a well made quality product with attention to detail. The reason for the convertible mounts is that you gain a bit more hood clearance needed with the taller deck height. The mounts drop the engine an additional 3/8 to 1/2 inch closer to the frame.  Good luck whichever way you go.
84 COUGAR/90 HO, 1.7RRs, performer RPM,700DP, equal length shorties, stainless EXH ,T-5,Hurst pro-billet, KC clutch, 8.8/ 4.10s, line-lok, bla ,bla, bla.
71 COMET/289,351w heads, 12.5 TRWs, 750DP, Liberty TL, 9"/6.00s, 11.9x @112 , bla,bla,bla.

Never shoot your mouth off, unless your brain is loaded! ....I may get older, but I'll never grow up!....If you're not laughing, you're not living!  :laughing:

5.0 to a 351

Reply #8 –
how Difficult would it be going to like a 460?
1974 Cougar XR7, 351 C, stock. white leather.
1983 Coug' LS-XR7-1/ A/c Delete, Edlebrock Intake, Holley 600 4bbl, Custom Badging, True dual Glasspacks
1989 Pontiac Bonneville SSE, 3.8L bone stock winter beater, in Gold

5.0 to a 351

Reply #9 –
You'll need a different trans with a 460...

I'd go with a 351w, over the big block, myself. Less weight, less cost.

Hell, if you're gonna go all out...get an LSx...2 valve power all the way baby!


Honestly...throw a 3.8 in there...they're hard to beat, lol
'98 Explorer 5.0
'20 Malibu (I know, Chevy, but, 35MPG. Let's go brandon, eh)

5.0 to a 351

Reply #10 –
Quote from: ThunderbirdSport302;363527

Hell, if you're gonna go all out...get an LSx...2 valve power all the way baby!



:rollin:  Your a rat.
Mike

5.0 to a 351

Reply #11 –
Swap is easy. Just build the engine the way you want to then install it. I used the chuck mounts. Awesome. I used the swap headers from bbk and a 95 5.0L x pipe. Then modified a Magnaflow cat back exhaust to work with the tbird body. I used 18" tips for the exhaust to reach the back of the car. Then do a mass air swap too. Then get a tune. I have not tuned mine because i am still waiting for my trans to be rebuilt.
1988 Thunderbird Sport. Work in Progress
5.8L swap w/fitech efi, 4R70W swap w/quick 4 controller, 2003 GT rear diff, 5 Lug swap

Bought this car back as an old project car.

:burnout:

5.0 to a 351

Reply #12 –
^yeah i had plans to go nutty and put in a massive engine, just because i couldnt find a cleveland in the area, but ive since found one, so 351 all the way! its even out of a 1970 cougar xr7. BONUS! but im definately carbing it.
1974 Cougar XR7, 351 C, stock. white leather.
1983 Coug' LS-XR7-1/ A/c Delete, Edlebrock Intake, Holley 600 4bbl, Custom Badging, True dual Glasspacks
1989 Pontiac Bonneville SSE, 3.8L bone stock winter beater, in Gold

5.0 to a 351

Reply #13 –
I wanted to do a 460/E4od swap but could not find a Econoline in the wreakers that was not under 500000km
1988 Thunderbird Sport. Work in Progress
5.8L swap w/fitech efi, 4R70W swap w/quick 4 controller, 2003 GT rear diff, 5 Lug swap

Bought this car back as an old project car.

:burnout:

5.0 to a 351

Reply #14 –
Hey sweet this is exactly what I'm wantin to do to my 88 xr7. Will I need to beat on the firewall any for this to work? I know 351 is soo very close in size but I wanted to double check. Gettin some ported C9 heads tomorrow for my windsor. After I get the motor built and find all the goodies to swap in a t5 I think I'll have a pretty sweet ride.