At home I have a list of links for the 4200 (if you're searching here it gets called 4200 more than anything).
I'll check when I get home and see if I can post them for you.
PM me if I forget.
I have a number in my mind, but I may be mis remembering so I'll hold off till I can check.
As for performance parts IIRC there is a tube header available (dunno if it's single or dual), one of our members was able to come up with a turbo manifold (one of the things I plan to check my list for) and to the best of my knowledge there have been 2 group buys of cam blanks (have them ground to suit).
