289 with GT40P heads
08-14-2010, 06:12 PM
#1
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Location: new jersey
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289 with GT40P heads
hey guys im from the 5.0 section and i have some questions. my brother has a 65 coupe with a 289 in it but the car is trash. my fox is with out engine right now and im really itching to get it back on the road. i know the engine will drop right in and mate up to my t5 but my main question is do i need to do anything to put gt40p heads on it and also what kind of compression would i be running with these heads? im only putting the engine in my fox to be able to drive it again since it has been sitting for 2 years. once im done building my 347 the 289 with find another classic to go in.
08-15-2010, 09:22 AM
#4
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Location: CA
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You just need the special headers, and here is a good article on figuring compression. Heads or head gaskets do not account for much.
http://www.hotrod.com/techarticles/h...tio/index.html
http://www.hotrod.com/techarticles/h...tio/index.html
08-15-2010, 01:23 PM
#7
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You do need special head bolts, readily available from ARP.
What year is the 5.0? After '85, 5.0's use roller cams which require a steel distributor gear. That steel gear will shred your cam drive gear. That said, a cast iron gear is fairly easy to swap in.
What year is the 5.0? After '85, 5.0's use roller cams which require a steel distributor gear. That steel gear will shred your cam drive gear. That said, a cast iron gear is fairly easy to swap in.
08-15-2010, 01:37 PM
#8
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its out of an 84 flat tappet cam. i know what the difference between the gears and the cams but all the dizzies i have looked at online are for just 289's or just 302's so i just wanted to make sure before trying to put the one from the 302 into the 289
Gear composition is the only varying factor.
08-15-2010, 04:33 PM
#10
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Yeah, 289 block is the same as a 302 block. Aside from casting numbers, most people can't tell the difference. Though I think there is a coolant hole difference between the block and heads? Someone else may know more about that.