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well the intake is bigger than the head. Like I said I'm not to worried about some minor hp loss, I just didn't know if it would make it difficult to tune. thanks for the reply

I bought a used intake manifold for my 318 build and it had been gasket matched. well long story short after looking at my 302 heads and seeing the HUGE push rod holes I decided to not try and match the ports. Now I am wondering what this will do to my drivability. This is just a daily driver...

I think I am just going to go with the stock pistons and measure the deck hight. I will figure my compression then and if needed mill the heads to raise it up to the 9:1 area. I was kind of just fishing to see if anyone had already done something similar so I had some numbers to go off of...

what octane fuel do you have to run??

see thats what sucks I won't know how far down in the hole they are until I buy them. I don't want to buy them if they aren't going to work. Its a crappy situation. I think I might just go with the factory 8.5:1 pistons and mill the heads to get my compression up a little. 33x12.5x15" tires...

well my 86 318 block goes in for machining tomorrow but I am still trying to piece this thing together. This is my build so far please tell me what you think: '86 318 block would like to bore .020 over if that's all it needs minimum decking just to clean it up stock 302 heads gasket matched...

that's what I was looking for! That high of a compression ratio will probably demand 91 octane fuel won't it?? I'm trying to stay somewhat street-able but have a good running engine for my daily driver as well. thanks for the answers

I'm not really sure my book lists them at 56-65 cc's but that's a BIG area. I guess without that exact piece of info I won't know will I. I'm not going to mill them unless I have to in order to get a good flat surface.

I am building an 86 318 with 302 heads and I was wondering what my compression would be with the 302 heads and the keith black 167 pistons if I didn't zero deck my block??? also what octane should I run with this combo?? thanks

I forgot to mention that I will be installing a 46re tranny with overdrive so that will help the mileage some!

hey guys I am wanting to rebuild the gutless wonder of a motor in my 1986 dodge w150 truck and crank up the horsepower/torque without killing my fuel mileage. Am I correct in thinking I have 302 heads on this 318?? If so would a standard 3 angle valve job be sufficient machine work?? Also I...