Have you ran in PSMCDR? It sounds like a good time and not real expensive. I've done a little research on the cost of building a engine for that class and it's around 5k. The most expensive was having the cylinder heads reworked because you have to use the stock size valve's and chances are the valve seats are going to be in bad shape so that will mean having the seats replaced and new valves. Also, finding a machine shop that will do a good stock valve job, correct valve spring height and overall valve height. The pistons that I looked at were speed pro and cost around $400