Hey guys I have been having a weird issue with my 1973 Chevrolet C20 with a 292 straight six and 4 speed manual with granny low. Just installed a new single barrel carb on the original intake manifold and a HEI distributor. Got the timing set to factory setting (4 degrees before top dead center) and I adjusted the idle mixture with a vacuum gauge (only getting 15" of vacuum at best) Before the truck ran Ok. But now the truck will idle and rev up fine when stopped but when I start driving and start braking the truck will stall out every time. I tried checking for vacuum leaks and haven't really found anything yet. Wondering if anyone has had a similar issue and found a fix for this. Wondering if the distributor is off by 1 tooth could that cause this issue where it will stall out only when slowing down?