I can tell u guys that I have did this many times. They all seemed to go better than stock. My buddy had a recently reringed 340 that didn’t run the numbers he wanted. We tore the motor down. Didn’t see anything wrong. Reversed the pistons and she ran 2/10s faster in the quarter mile. I had a 67 Dart GT I put a 70 340 in. It had the 284/484 purple shaft with Rhiads lifters, LD340 intake, 750 Carter Competition carb, recurved distributor and Casler headers with 2 1/2 in exhaust. 727 with factory high stall and 3.55 gears. The pistons were swapped side to side. Drove it 120 miles to the track. First run was 13.9. Eventually got it down to 13.2. Kim
