ORIGINAL: xxxnt236
Just get the engine you like best. Personally i would say the go 7 port cause the 7 port has plenty of power and bottom end. I love the thing to death in my buggy. But it comes down to what you want. Dont buy sometihng your unsure about because then you may end of regretting it.
All of the GO engines are excellent 3 port for bottom end, 5 for medium, and 7 for top end. I personally think the 5 port is good, because you can change its torque curve just by changing what pipe and venturi you are using.