Here is what I used on my 493. I used a 440Source 4.15 stroker kit with dished pistons so I could end up at 10.6 comp with the Indy EZ heads I used. I bought the heads from Dwayne Porter and he did a little work to them. I also had Dwayne spec and grind the solid flat tappet cam I use. He is very good and I wanted a cam to match my build. Every car I see with his cam in it runs great. Up top I use the Indy dual plane intake and an 850 DP Holley carb. It runs very good for me. Its a 92 pump gas eng with good quench. When I race it its thru the full 3" exhaust system on pump gas of course. Its in my 3700 lb 63 Sport Fury and has run 10.70's so far. I know it has more in it if I ever get back to the track. I also drive it to the track. Good luck , Ron