the only thing with adjustable items like you mention is the worry of something vibrating loose and screwing the engine up, perhaps i am neurotic about these things but it would always be in the back of my mind having built numerous high performance engines for rally cross i am somewhat a fanickerty pain in the date when it comes to these things have blown up more money than i should ever have been allowed too. plus personally if holes are to be drilled in the block would put me off a tad..... ideal if your engine is already in bits on the bench of course
