L322 td6 powerbox

hi peeps not been on for a bit as to be honest me p38 not given any probs but i sold it and brought l322 td6 03 anyhow been reading a lot of threads about powerbox/remaps and just wondered if anyone can recommend whats best ,ive read that the gearbox has tantrums and the cruise control starts bein sick your thoughts plz

I personally wouldn't....the GM5 box on the Diesels is a major fail point, sticking any more oompf through it will no doubt finish it off in short order.