Hello everyone. Since I am new to using a Buick 455 in a car for drag racing. I was wondering what this motor should be set to for initial timing, what rpm to have it all dialed in by and whether I should use a vacuum advance on as well. It has been converted over to hei from the points distributor (its sitting on the shelf). A friend of mine says to have 4 degrees of initial and have it all dialed in by 2500 but his gs455 still has points distributor. Are there previous threads for this question that I should reference or someone have a better suggestion from experience. Thanx.