well that comes out to 498 cubic inches. being .060 down the hole on a 498 stroker is not such a bad thing.

Are the pistons flat top no valve relief?? (I'm guessing flat top)

Anyway with a fel pro composition gasket and 84 CC heads 10.4 to 1 compression. 76 CC head 11.2 to 1

What Kind of heads. the least expensive option would be another set of
cast pistons
http://www.summitracing.com/parts/slp-406ap

http://chucker54.stores.yahoo.net/sterling1.html

Now if he balaced it (and I said if) you may be close enough to go as is but I think I would balance.

If the LY rods were not resized and ARP rod bolts added then the cost involved you may as well buy these and do it right

http://www.summitracing.com/parts/esp-6760c3d/overview/make/chrysler

http://chucker54.stores.yahoo.net/corodse1.html

990 pin
http://www.summitracing.com/parts/esp-6760b3d/overview/make/chrysler

Basically you got just the crank out of a stroker kit?? LY rods everyone has laying around lucky to get $50 a set.

You should go with a forged piston, new rods and balance this would require finish honing .005 more. and require the .990 pin rod
http://www.summitracing.com/parts/uem-ic840-055

so the only cheap way to get up and running would be the seal power pistons .