10-05-2011, 03:44 PM
Ok, so I am looking at doing a frame up build on a 91 ext cab short bed for my oldest child. It will be a "father/daughter" project and hopefully a learning experience for her also. So I was looking to get some prices on crate engines and noticed a 260+hp 300ft.lb. marine 4.3 v6. It was about the same price range as a 350, but im thinking would be lighter and more efficient. Also, I'm no marine mechanic but from what I understand marine engines have heavier duty internals to stand up to long periods at higher rpm's, and a stronger low rpm power band. I also used to own a skiboat with a 3.0 180hp 4cyl gm marine engine, that thing would fly, and was decent by skiboat standards on fuel consumption. I'm in Louisiana and emmissions testing is not an issue, they dont even check for cats, so anybody have any thoughts on replacing the old 305 tbi with maybe a 4.3 marine with a quadrajet and 2004r? Maybe a turbo and run it off of propane later on?