first post have 69 mach1 with 408 stroked windsor putting out maybe 450 hp need to get 500 this is what i have new motorsports block steel crank rods alum pistons 10.50 comp. lunati roller 536 on both in. and ex. 218 228 a .50 1.6 rollers stealth dual plain 750 vs speed demon sr heads cncd 64cc. cast iron msd 6al 1\3\4 hookers 3'' x pipe into 2.50 ex flowmasters 3.50 posi is this cam to small for this engine should i port heads etc. also will put on electric fan remove powersteering put on pulleys alsofmx 11''2500 stall thanks great site.