looks like your in a muddle and not really understanding things, get a proper bottom built up, mgnmt dosnt really matter for the final output but obvoiusly anything modern is going to better than ke as remember its a very very old system and most of the wiring will be fucked now anyway.

imo build a nice standard size bottom end(crank, bearings, pistons) nice ported head and you wont have any problems with 200hp!!

my KE was running perfect but the only reason i would replace it would be so i can change the loom for a new one and to get rid of some of the running problems.

good luck