Sup everybody-







Well, I'm about ready to install a proform main body(750+) into my 650 double pumper. The jets I have now are 67pri-73sec. The jets that come with the kit are 73 & 81. I know that you always have to tweek your jets for tuning up, but I wonder could anyone guess what is a good place to start at? - Thanks







Here's the engine- 73 truck 454 - stock internals - 8.5 to 1 compr?



Heads - 336781.....73-85...oval...OPEN...454, 118cc chamber, 256/114cc ports



cam- dur 234,244 - lift .325, .345, - 7.2 rockers



Headers, msd ign. ,15 btdc, no vac adv,