1988 k1500 305 w 3 spd auto. White smoke on startup. Exhaust is pretty much hammered and see through for all exhaust components. Exhaust pipe fell off last week(lol). I have purchased long tube headers and am contemplating putting them in and addressing the rotted remnants of the exhaust. Concern is as soon as i try pulling the factory exhaust manifolds, i am gonna snap off the bolts. Once i snap off the bolts, i might as well rip off the heads and get them up to standard and address the probable bad valve seals and whatever eldritch horror awaits me beneath the valve covers. But it are a 305 and after i do all this stuff, i will still be running severely limited non sexy hp numbers. I would like a little getupandgo. Thinking i can skip some pain by just purchasing a crate engine with more power. 300hp probably more than enough, i dont mind staying w tbi, budget is 10k max. Hit me and ty in advance for your collective wisdom.