Magnum 46 modded with Jett pipe
My engine guy did one up for me. 15,100 on 10x8 APC with the red pipe or 15,200 with a 10x7 APC and a Tower muffler. Wanted this one set up so can run either muffler. timing was set to 168, transfer at .100 raised compression, crank timing change just a bit and the carb opened up to .330 but this big it has to be glued in.