My distributor needs a new vacuum advance. I looked at my extra W30 distributor and it is numbered MS 408 24 which I think is incorrect. I also have an NOS Niehoff number DR-322 on the box with stamped numbers on it 436 20. Would either of these work? If not, what applications are they for and where can I find a correct replacement. I believe the ones sold by the box stores are all too generic now-a-days.

 

I think either will work, but not be optimized for your engine if the cam/Carb are still at OE specs. I think the advance you need is the MS 427 stamped unit - Chris Witt (Octania RIP) fixed me up with one. They are pretty difficult to find - good luck.

 

thanks, after more research i found this info about the 427

1973427

VACUUM ADVANCE unit for pts Dist'r.

Stamped "MS 427 16" = 16 Crank Degrees advance possible.

Starts at 10-13" Hg., 4.2-7.3 °Dist @ 16" Hg., 7.2-12.8 °Dist @ 25" Hg.<= per 70 CSM


The last number correlates to the vacuum advance so the two I have both are too high. One at 20° the other at 24°


Anyone know a part number for a replacement unit with 16° advance. Or have an extra NOS one they are willing to sell?


Thanks