just ordered a set of these for my 306.. good stuff, i've bought them before.. haven't seen them in a while, until tonight.. you just have to buy studs and push rod guides and you're good to go.. just sucks they don't have them in 1.7 ratio, but they have 3/8 and 7/16 (different auction) stud mount. most (if not all) factory ford heads are 5/16 - 18 thread, but you can buy studs with the 5/16 base thread and 3/8 on the rocker end.. or drill and tap your heads for 3/8 (or 7/16) studs.. says 'adds up to 30hp' but i don't think that's all that accurate, but they do free up some power lost from the friction of standard, non-roller rockers
http://www.ebay.com/itm/110700286928?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
goodness gracious.. i keep finding more good deals
RHS / Pro Topline heads
http://cgi.ebay.com/ebaymotors/RHS-SBF-FORD-Aluminum-Heads-35001-Windsor-Bare-64cc-180cc-ProTopline-Mustang-/360397315295?pt=Motors_Car_Truck_Parts_Accessories&hash=item53e95a9cdf
no-name cheapy aluminum heads, same specs as some name brand heads
http://cgi.ebay.com/ebaymotors/5-0-5-8-DIRECT-BOLT-PERFORMANCE-HEADS-SBF-FORD-ALUMINUM-BARE-PAIR-/290609654710?pt=Motors_Car_Truck_Parts_Accessories&hash=item43a9af6bb6
ProComp heads.. i've installed a pair of these for a customer before, it's a good idea to take them to a machine shop to get them checked first.. they perform pretty well with a little port cleanup in the intake runners with a dual plane intake and gasket matching.. the motor i put them on dyno'd around 433hp with 9.8:1 compression and a decent little list of go-fast goodies, dyno'd at 394hp with a pair of decked and ported GT40p's, just to give you an idea.. pretty good gain for the price
http://cgi.ebay.com/ebaymotors/NEW-SBF-FORD-Aluminum-Cylinder-Heads-190cc-289-302-351W-/390300487226?pt=Motors_Car_Truck_Parts_Accessories&hash=item5adfb8ce3a
I wonder how much more horse power the aluminum heads would actually give over my ported GT40-P heads. I know the difference in weight,but I'm more curious about the HP differences.
would really depend on the combo.. but with some good cleaning of the ports, port matching the intake and stainless valves, you could see a decent increase
well this sucks.. i got my rockers today and 1 of the rollers are split, so i have to send em back and get a new set >:l i wanted to put these things on today..