5.0 block differences December 29, 2008, 11:01:47 AM Ok so I want to start bulding a new motor for the Bird. My question is this. Is there any difference between my stock 5.0 block, HO Block, Cobra Block?Just the block I know there are many differences between heads, intake and internals. Quote Selected
5.0 block differences Reply #1 – December 29, 2008, 04:01:20 PM There is no differences unless you get a older cleavland 302 or boss 302 or ford racing block. If you are doing a swap I would just go the 351 rout because they can handle more horsepower than 5.0 block.There is lots of info on this subject over at http://www.turbomustangs.com When I blow my engine thats my plan. Quote Selected
5.0 block differences Reply #2 – December 29, 2008, 04:33:37 PM I do have a 351 block but its a clevland out of my old torino from what I have read this would not be a simple swap Quote Selected
5.0 block differences Reply #3 – December 29, 2008, 04:54:45 PM If you have to buy all of the stuff to swap in a 302, then it would be the same as swapping in your 351C. To answer your question, the 5.0 had a roller camshaft install and the subsequent attachment points installed in 1985 as well as a one piece rear main seal, otherwise all 302 blocks from 1985 on up should be the same, with exception of a few 1984 carryover blocks in the and full size cars and trucks. Mustang blocks would all be the same from 1985 on up and the T-Bird and Cougar seems to be a hodge podge conglomeration of the cars and trucks. If it has a one piece rear main then it should have the roller cam attachment points in the lifter valley. Otherwise Cobra, SO, HO, GT all the same block.....think on the level of Mass Production (Auto Industry) and you will understand. Quote Selected
5.0 block differences Reply #4 – December 29, 2008, 05:43:59 PM Just wondering but IIRC the 85 and up roller blocks that had a factory flat tappet hyd cam have to have the bolt holes for the factory roller cam *spider* tapped correct? Quote Selected
5.0 block differences Reply #5 – December 29, 2008, 06:09:06 PM Yea I know the cleavland is different. Im not to sure of the plus's and minus's but the windsor is far more common and there are lots of parts avalible Quote Selected
5.0 block differences Reply #6 – December 29, 2008, 06:33:53 PM Quote from: thunderjet302;249291Just wondering but IIRC the 85 and up roller blocks that had a factory flat tappet hyd cam have to have the bolt holes for the factory roller cam *spider* tapped correct?nope. All roller block 302's had a roller cam from the factory. You may be thinking of 351w roller blocks. And even those were tapped, but came hyd flat-tapper cams. Quote Selected
5.0 block differences Reply #7 – December 29, 2008, 07:05:03 PM Quote from: 32VFoxBird;249307nope. All roller block 302's had a roller cam from the factory. You may be thinking of 351w roller blocks. And even those were tapped, but came hyd flat-tapper cams.Off topic: I have a '94 351. Block casting # is F4TE. Shortly after getting it I decided to sell it and build up the 5.0 in my car instead. I advertised it as a roller engine. Somebody emailed me telling me I was wrong - the engine was not a roller. They said that the block had provisions for a roller cam, but would not have a roller cam installed. I think someone on this forum told me the same thing. Curious, I popped the intake, and sure as there's shiznit in a cat, there was a roller cam in there.The beauty of loving Fords, I guess. Nothing is ever concrete. Quote Selected
5.0 block differences Reply #8 – December 29, 2008, 07:34:43 PM That's the one from a van, right? Are you sure the previous owner didn't swap the cam? I've never seen a roller 351w block that came with a roller cam from the factory. Quote Selected
5.0 block differences Reply #9 – December 29, 2008, 11:30:24 PM The H.O. had valve releifs in the pistons and were forged(most of the time). Lower intake is the same. Upper from a H.O. bolts on. Check out http://www.coolcats.net/tech/ Quote Selected
5.0 block differences Reply #10 – December 29, 2008, 11:54:42 PM Quote from: thunderjet302;249291Just wondering but IIRC the 85 and up roller blocks that had a factory flat tappet hyd cam have to have the bolt holes for the factory roller cam *spider* tapped correct?Yup I have a '85 truck block that had a std cam, has the taller lifter bores and spider attaching bosses, they are not tapped however...Quote from: Lightningbird;249286If it has a one piece rear main then it should have the roller cam attachment points in the lifter valley. .Nope... The one piece seal became std in '81, long before any roller blocks were produced... Quote Selected
5.0 block differences Reply #11 – December 30, 2008, 01:24:28 AM what year started roller rockers inside .....the 302__________?the 351__________? Quote Selected
5.0 block differences Reply #12 – December 30, 2008, 07:39:38 AM Quote from: 32VFoxBird;249333That's the one from a van, right? Are you sure the previous owner didn't swap the cam? I've never seen a roller 351w block that came with a roller cam from the factory.It is the one from the van. I don't know anything about the history of the van before my brother owned it. I do know that when I posted the question on FTE (Ford Truck Enthusiasts) I was told by most people that a roller cam in a '94 was normal, while a few said they'd never heard of it. It was a work van from day one, owned by a fire extinguisher company, so I can't imagine it being "hot rodded". It is definitely a roller cam, though: Quote Selected
5.0 block differences Reply #13 – December 30, 2008, 10:55:59 AM Quote from: Thunder Chicken;249426It is the one from the van. I don't know anything about the history of the van before my brother owned it. I do know that when I posted the question on FTE (Ford Truck Enthusiasts) I was told by most people that a roller cam in a '94 was normal, while a few said they'd never heard of it. It was a work van from day one, owned by a fire extinguisher company, so I can't imagine it being "hot rodded". It is definitely a roller cam, though:The roller cam was std in 351 for the '94 - up models, these were a revised casting block with a F4xxx number... I've heard some late '93s used the roller, but that may just be early '94 blocks cast in '93... The 351 roller I had was cast in Nov '93, but came from a friends '94 F-150 he had purchased new, was no doubt factory...Anyway, the threaded bosses in the lifter valley and spider retainer are a dead giveaway of a factory roller... Quote Selected
5.0 block differences Reply #14 – December 30, 2008, 11:00:13 AM very interesting and good to know. Quote Selected
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