d16y5

i have or had an ex. unfortunately my camgears slipped off timing and ruined my engine. i ran into a d16y5 for a good price. now is it hard to modify this engine? i have a custom tubo kit i had origionally bought for the d16y8 engine, will it still fit? only advantage i see is the longer gears but the down side is it's 10 horses shy of the d16y8 . should i have a problem with getting performance parts for the d15y5?