The simplest and least expensive HEI will be the 250/292 Chey distributor from a salvage yard. Other than doing a little tinkering with the mounting flange, it's almost a drop-in fit. The 2.8 Liter Chevy V6 ("Mini-HEI") needs some adjustment of the shaft length, and there's only a few of them out there with vacuum advance. The full electronic advance mini doesn't work without a computer onboard. Does the 3.8 L Buick/Olds even fire V6 distributor turn the right direction? (clockwise) I don't remember.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!