I just can't decide. Originally was going 383, but was told I'd need to have custom chip burned and it may be too much torque for my drivetrain. Then I thought 350 HO, then it was ZZ4. Now I have been looking at goautocenter.com. They have this 270 HP truck engine for TBIs here http://www.goautocenter.com/350_tbi_1987-9.htm Then at the bottom of this page, they also offer a 350 truck engine with vortec heads and the Edelbrock MPFI. Kinda sounds like exactly what I want to do. They want $3400 for this engine. Would it be easier to do myself? Buy the short block and buy vortec heads and the MPFI? Is it worth it? I emailed goautocenter and they said that this is the most powerful engine you can get for a stock TBI truck without going crazy with custom mods. He said although they claim 270 HP on the TBI engine, he said most people realize only 240, and the latter engine with the Vortec heads and MPFI actually gets about 265. Does that seem low or is it just me? I am intrigued by the MPFI and wonder if it will help my mileage any. I have an hour and commute each way to the Air Force base daily. Too many options and too little money. I'd like to keep the whole project in its entirety under $4000. I've also heard the 383s don't last long running a TBI, adn that they're truly made for carburation. Thoughts?? Anyone know anything about goautocenter? They offer a 3 year GM warranty on the 270 HP engine.