I wouldnt bother building one, just buy one and slot it in, there are good low mileage examples out there.

If you want to build something just for the sake of building it, a pinto or similar is a nice simple way to go, the tolerances on the honda engine are pretty tight for a first time effort.

Not sure on the current cost, they were a couple of K last time I looked.

Capable of 9000+ rpm as standard