Now when you guys read this, this is built to prove a point of what can be done I have read alot of what people say can't be done and I smile because I been building engines to long so I know what can and can not work so here goes, I started with 5.0 block stock crank then I used 86 trw true flat top forged pistons with no valve reliefs then I used gt40p heads and replaced intake valves with gt40 heads because I wanted intake and exhaust valves to be flat no dish this AIDS in upping compression, next I used the gt40 springs because they are stronger than P head springs and you can tell that easily with spring compressor, next I put in an f303 cam giving me a 512 lift next I added 1.7 roller rockers giving me a 544 lift, gt40 intake 24lbs injectors and stock gt40p exhaust manifolds in the process of fabricating 5.0 shorty headers to make fit, truck runs perfect and does not miss a beat also I do not have the oil cooler or and oil filter relocation kit, just find a filter that clears the frame and you are golden as I did now I just need to get a tune Soon but but I can drive it anywhere and have ac and all in my 2007 Ford ranger