Well I was over on the Quad4 site, and apparently the Quad4 is a pretty good engine, excpet fo rthe head gasket problem, otherwise they are mean little engines. Quote -
The standard non W41 442 will run 0-60 in about 7.5ish seconds and the quarter between 15-15.5.
Common problems with this engine are the headgaskets, which generally go about every 150k, don't beat on her when she is still cold, watch your oil pressure, and just general maintenance and you should be good for a while.
Common performance mods are:
3.94 FDR int slave tranny ( stock for us is 3.61 ext slave )
That alone with a proper running HO will put you in the 14.6-15 second range if not a bit faster.
Then there is a TRS header, good luck getting one as Josh has seemed to have fallen off the face of the earth, but if you do manage to get one, get a good 2.5 inch pipe all the way back and you are looking at +20HP dyno proven.
Easy do it yourself mods are a home made 3 inch cold air intake, it may not do anything for performance but it sure as hell sounds cool!!