Originally Posted by Whitelightning
No 261 came with HEI. I believe HEI came out around 1973 or 74...
John

They started with it in 74, and in 75 it was on all GM engines.


1946 GMC Pickup - S-10 Frame, 455 Buick, TH400, original patina.

My 46 GMC on Photobucket