ok guys/gals...need some help...

i have 69 350 with a 2 barrel and recently converted from points distributor to hei...

the book says set timing at 9 degrees btdc...but that is with a points distributor...

where do i set it for an hei distributor?

henry

The timing reference where your engine runs best should not change. When all else fails advance the timing as much as you can without getting warm start slow cranking.
Jim

When I was in the same situation as yours, mine ended up being 18 degrees and runs great.

Also check your engine vacuum at the maniflod. It should be about 20-21 when the timing is correct.

when we initially set the timing with a timing gun it ran decent...

but since we went in to adjust the timing a second time with a timing gun it clatters? like crazy when i accelerate...have you guys/gals run into this problem?

thought i might have lifter problem but on second thought i'm guessing it's the timing...

so i think i'll set it at zero btdc and advance it accordingly..

henry

Make sure you are really picking up #1 lead with the timing light, and that the distributor body is not too loose while you do adjustments, and that the balancer hasn't slipped. I set by ear, turn back until the engine cranks like crazy but runs very weakly, adjust advanced (with distributor vacuum port plugged) until engine runs smoothly and let it warm, then adjust again until the first hint of warm cranking resistance shows up. Back off a touch from there if necessary to eliminate pinging. Then take it for a test drive after snugging the distributor clamp. If all is happy, mark your balancer for later reference.