Lode...backfire richen up the mixture a tad? Timing on the BB is a good starting point left of the window is advance there is a pointer at the middle of the window for the BB set up and to the right of the window is retard. Mine runs best a little advanced but I have an HEI. Don't worry, there will be an expert along anytime now.

BILL, if you are reading this help the lad out.
Steve