408 Stroker Build Suggestions

I’d sell/trade the LD340 for a used RPM and use the $100 for something that will actually improve performance or reliabilty.
How much is a used LD340 worth? You're saying I'd come out $100 ahead by selling it to buy an RPM? I had no clue the LD340 was really worth much, it just came on my Roadrunner (which I didn't even realize until after I purchased it, I thought I was getting the stock two barrel under the air cleaner and was very pleasantly surprised).