[1969_CM2590D]

If you search Jeg's for the Mr. Gasket 1937, a TransDapt adaptor will show up as an alternate. If you look in the catalog you'll see TransDapt's logo, but Mr G's p/n-1937. The TransDapt listed online has a different p/n than Mr. G's and it's about a dollar more as well. Since Mr. G's #1937 was what was referenced here, that's what I chose.

Here is the difference in the carbs:

4412-S has a silver finish (what I picked- I like silver!)

4412-C has a gold finish, chromate based, I think

4412-CT is the circle track (hence CT) racing version.

Make sure you check eBay for these. Holley Performance will offer remanufactured 4412's there from time to time. A 4412-C was listed early last week for $199, I bought a 4412-S last night for $229. That's a savings of $100-$200 wherever you buy it. I have no idea on the price difference- as new the -S sells for less than the -C. Go figure. These carbs are warranty return and a search of some of the performance boards gave them overall very high marks. Some who claimed to know said the units are NOT defective or damaged. Holley tosses the junk. What they reman are those that been setup incorrectly by "smart" owners (i.e. incorrectly re-jetted or adjusted) or have some minor part like an arm that was bent or broken when installed. So Holley takes these back to honor the warranty. They will have little- and likely no- use on them. You'll also get a 90-day warranty. Just make sure the seller is Holley Performance.