Originally posted by DennyW
Here I am. I agree on this one. Unless your really built up, and not close to stock, If your camed over the top, the rpms' are so high, you need to set total advance settings, but, close to stock , you wanted a vac, suck your face off vac port, hahaha, then pull the hose off, set your timing, and re-install. One other nice tip, and it's so simple, the basic rule for timing, especially if you don't knoe!!, Warm the engine up, make sure the idle is not to high, hook up a vac gauge to the full vac port. Adjust the distributor to the highest vac setting,(you'll know when you went to far, cause it will start to drop, and the engine juggle a little,) Then back off 2". So, if you get a high of 20" reading, back down to 18". Most of the time you will be almost right on the time mark. The important thing is the breathing of the engine will be set. Hope this helps. I've seen the HEI both ways on some vehicles. I think Olds was like that. As far as I know.
thanks danny i agree