Great info Damon!!! The block had casting number 14093638. When I pulled the timing cover I found the cam to be a Comp Cam with grind number 260H12. The top of the pistons are (what I call) double D's (stamped with number H423NP 020, I haven't looked those up yet). They look like two sets of D's (4 total) back to back, probably the dished pistons you're referring to. Thanks.