Well one thing for sure Is the 4.3 engine is a fun one to play with.One thing is a cold air intake ,chip or programmer .The exhause can make some well needed improvements.I think you said a your was a 92.The chip and exhuast is good place to start.But if your engine has lots of miles then you should take another route. rod and main bearings .Then call someone like ultradine and tell what your plan is and they can help with cam shaft.Good luck
