It's really not that complicated to run forged pistons..and some of them have offset wrist pins to reduce piston slap and friction:
http://blog.wiseco.com/what-is-wrist-pin-offset
If the OP was building a stock SR I'd say go for a stock rebuild, but he mentioned 350whp which is about double the power with much higher heat compared to what the original engine was designed to do. I would recommend investing in parts that are designed for much higher heat tolerances, even if they require a short warm-up cycle.