I think you should spend your money on renewing your engines lifespan. It must need some serious maintenance if a 5k
can't rev past 6400rpm. Even though mine is worked a bit, I can take it to 8000rpm (when it's tuned properly :n:). It obviously
doesn't like it because it's not tuned right, but it still does it!
Otherwise yea, best things to get done:
Exhaust, compression, cam. If you've got some cash left over a head job would be the way to go. You can pick them up on the
corner of the street pretty easily. :locked:
In all of that, you're probably going to want to do at minimum a rings and bearings job too.