88warrior350

Ok thanks, i was thinkin 280-290s so I guess wasn't to far off.

I'm trying to figure out what main jets ishould start out with. I just rebuilt the top an bottom End. Mods are fmf fattys, +4 tIming, no air box k&n, Vito's SS pistons. Elevation is about 450-1000 . Temp 60-90. It had 240 mains before I did rebuild. Only thing that's different after the rebuild is the Vito's super stock pistons, just trying to save myself from another expensive rebuild, piston seized an broke the rod. Then the rod destroyed cases. So now I'm really worried about jetting to lean, an just need a good place to start.