I dont know that id be as concerned about the pistons as the bearings..
not sure which franken build youre referring to. coming of a hydra head mated to mech. block, and am looking forward to going back to mech lifters.
i plan on doing something like Smokey Eddy. Im gona drop some cash on the 1.6 bottom end and start lookin for a aaz head.
nice lookin body on that jetta, doesent look like much rust, lol that an aftermarket cooling fan i see on propped up on the strut tower there?