I'm building a 5.7L engine for a 1990 full size chevy equipped with tbi and manual transmission. I would appreciate any opinions, facts and advice on my rebuild. The truck will be used a lot for pulling a boats, trailers and equipment. I need some torque. I'm not on an extremely tight budget. I need to know what I can have done in the machine shop that would help make some horses, such as milling the intake/exhaust ports? I've built engines before that turned out great but they were just stock nothing special. What would anybody suggest I do for fuel. Carb, or use the TBI? I can't make up my mind. This is my main hangup, because I need to make up my mind so I'll know what cam to use and whether or not I'll need a custom PROM. Any and all suggestions would greatly be appreciated. I need a strong motor without sacrificing to much gas mileage. No turbo or supercharger for now. I could live with 10-12 mpg but would prefer 15+.