deion82

Ok i have a 408 callies shortblock getting built. My question is what head would you guys recommend? My plan is to either twin turbo or go old school with a 10-71 roots blower with enderle bug catcher efi. I'm undecided at this point. I know a turbo will blow the roots out of water in terms of HP. There's just something about a blower sitting out of the hood. Anyways the engine is 8.5 cr -w- 70cc head. My builder who is a former katech employee said to go with a ls3 head and have a full cnc port done by another former katech employee and have a 1,000 plus hp head for cheap. A turbo setup i'm looking for 1,200 fwhp and the roots setup 900-1,000 hp. Both setups will be E-85 and street/strip vehicle. The vehicle is a 91' gmc sierra pickup that's tubbed, narrowed, cage etc. 5.14 gears with a 32-18.5 tire. It'll handle what ever i want to throw at it. Thanks in advance

turbo iroc

iTrader: (1)

Any factory head casting will be at its limit at around 900 rwhp as far as head sealing goes. You could have head lifting and water pushing issues. I think an aftermarket thick deck head is required for those HP goals. I plan on running l92 heads and an 88mm Turbo on my 402 and hopefully the heads wont push water at 800 rwhp. If I want to push it further ill probably go with an aftermarket head.