Timing for 440 with mild cam

[Meep-Meep]

Well, it seems clear what you are seeing and it's correct. No question about what's what when the timing mark says before and after. I wanted to make sure of that first.

AG has some good points about the mech advance, so in addition make sure your springs aren't broken or too loose. Very loose springs may cause erratic timing readings, which you would have seen early on. No matter what if you apply vacuum to the vac advance unit it will advance the timing. What side is your vac advance can on looking from the top of the dizzy and the can facing you? I have seen a small block distributor housing with a big block shaft.

 

[CjVan]

If anything, its possible the dist is from the orginal 383 ir they are interchangable with 440s. If not then its regular original dual points dist with petronix ignition.

well If im infront of the car and looking over the dist, the vac advance is pointing to my 3 o'clock. maybe my 3:30.

 

[paladin06]

Good thread but it died years ago. Hummmmm

 

[69a100]

You must be bored to dig up 3 yr. old topics, LOL. But you raise a very valid question.