Quote Originally Posted by 02GrandPrixIraqVet View Post
Dont really get what your saying here, Ive got a gen5 2nd L67 engine in the garage and will have an IS3 cam shortly. Why would this be hard to tune and reccomend starting with a 3.4 pulley on the Gen5? No IC either or meth. Looking to have Gen5, headers, IS3 cam, ported heads 130lb springs, E85, HPTuners, 65 lbs injectors. All said and done. Heads Im looking at getting should be at least = to or better than the IS3 heads their Mizly motorsports P/P with TI retainers oversized valves and 130lb springs. If I plan on building this with the 2nd L67 thats in the garage would be better to find a different short block?
Well I was speaking about the L26 block, which is what I have. Mine has been extremely touchy and has caused me to spend hours and hours working on my timing tables to get comfortable with driving it daily and being able to stab the throttle. I worked out all of the WOT issues, it's just the part throttle hills and valleys that drives me crazy.

One of the reasons I don't care to do mail order top swap tunes.