Check this out, I have one in my truck and love it. It's rated 255 hp with factory fuel injection but with a good carb and headers it'll make 300 hp. It has a lot of low end torque also. You can cut the bosses down on the valve guides and add a bigger cam and make over 400 hp if that is what want.
https://www.summitracing.com/search?...yword=12530283