Trick flows are a cinch to bolt up. I prefer the newer graphite head gaskets, nearly blow proof, but you can also use their O ringed heads if you use nitrous or a blower.
Intake requires an RPM or equivalent, exhaust works best with a 1 5/8 primary header.
My engine makes over 425 hp. I love it. Great off the line torque, plus plenty up top. The midrange is simply killer. Car goes 30-80 mph in under 3 seconds. This really scorches the non blown rice rockets out there.
On a 302, you want to use ARP or equivalent head bolts (fresh) and use silicone on the bolts since 302 head bolts get into the water jackets.
You must use cobra roller rockers or crane gold racing roller rockers.
You must use longer pushrods, or you will break a valve stem. Summit racing will know what you need if you purchase them from them.
Do not use a permaseal intake gaskets. They get sucked into the intake runners. Use the new ultra cool 1250S felpro gaskets. The S is for stiff. They are a hard plastic that does not get sucked in. VERY IMPORTANT. I sucked in 5 sets of intake gaskets waiting for the S to hit production. When the water jacket fails water pours into cylinder one, and the white cloud of smoke is very impressive.......
My heads have been on the car 5 years. I beat new corvettes to 100 mph by nearly 20 car lengths. This is with 325 gears and a C4 automatic. With 4.30 gears I would be late 11's on engine alone.
I did port my heads to the 1262S size gaskets. This puts me 1/4 inch short of 428 cobra jet heads. Stock 428 CJ's ran 11.05 quarter miles in stock brackets and we ran ours at 9.2 with a tunnel ram and 486 gears.
Hope this helps. Call me at 503-443-1502 if you have any other questions.
Jim Howard
jim_howard_pdx@yahoo.com