383 or 5.3?????????

[highperf4x4]

Originally Posted by americanmusc1e

yeah, I've had some problems tuning my holley for below 50 degree weather. and I think the 6.0 would get a little better mileage.

I'd put a BB 502 or a 454/427 small block in my truck if I had the money(that's what I think of gas mileage), but I'm on a budjet.

Bro if it's budget you're worried about, I'd definitely go with the gen1. You are already set up for that and you already have the block, heads, pistons. Even if you don't go with the 400 crank, you still can make excellent power from your 350. I know you said the block was bored .060 but as long as you don't overheat the engine from a coolant problem you'll be fine. Like Jim said, if the engine is built right and you maintain it properly, it will outlast your truck.