Jerry, yeah I notice that but thought it was more to keep the mixture richer inorder to keep the engine from hesitating/stumbling until it warmed up.

Wrench, you may be right. My 72 ACVW's vacuum advance line has a trap in it to keep fuel from inadvertently making it's way to the dist. I may reproduce it on the 216.

Carl, Either that or the linkage has separated from the diaphram, hummmm....

Roy, that's right no vacuum at idle but there's vacuum at 1k rpm where I let it fast idle to warm up.

These units run anywhere from $35 to $75+ for an NOS.



1949 Chevy 1/2-Ton 3100
1949 GMC 1/2-ton 100
In the Stovebolt Gallery
More pix on Photobucket
Video of the 216 running
Video of a Winter Cruise