Stroking in most cases is a breeze. Scat makes great stroker cranks that are very reasonably priced...You can find them on Ebay. Pistons for a stroker can be had just as easily.Those two things and a little conservative clearancing are all you need.
If you want to run a Performer manifold get the Performer RPM. The standard Performer is a stock replacement type unit. It's OK, but the higher rise of the RPM model is much better.
Comp will give you exactly what you ask for and all you need to do is tell them what engine you have. I'd definitely go with the roller if it's affordable to you. ( If you have a 91 302 it's already set up with a roller.) You can get a much more aggresive grind with less problems overall. Put it in and forget it.
The pistons you have are dished and shouldn't present a problem with 202 valves depending on your cam lift although if you're building a torque motor and aren't worried about the loss of some high end HP the smaller valve models will work fine.
Hope this helps.
Bill
