timing change

[fryedaddy]

i changed from a msd box to a gm type module and now my timing is 3 degree higher 33 to 36 total.i have a msd distributor with the black bushing in it.question is ,do i change to the blue  bushing or whatever color 3 degree is or do i just retard the timing 3 degree.i noticed the extra timing is making it hard to hot start.

[GerryP]

That is common for it to pick up timing when changing to an HEI module.  Roll your initial back to where it was.

[6667fan]

After you pull 3* out of the initial what will your initial be at?

[1964Fastback]

Don't the bushings just limit total advance?  So if you switched bushings, I think it would still be 3 degrees advanced at idle but have less total mechanical timing.  I agree - just set the initial back to where you had it.

Pat

[fryedaddy]

I get it now,my int was 15 total 33,now its int 18 total 36.if i back the int down to 15 again the rest will be back where it was at.i dont know why but i was thinking the bushing was the int instead of how much it advances.