The BM644 A would be only one type. It is the bottom cushion or insulator. (to on core support). They have the molded in washer and are the only ones worth a damn. ---------- Post added at 09:19 PM ---------- Previous post was at 09:16 PM ---------- Get the BM 644A from Oldbuick parts. By the others from Inline individually. The only mounts different are the ones under the doors. They sell those as well. The Inline Mounts are very close to originals. I am not sure about the kits as they are usually junk. ---------- Post added at 09:50 PM ---------- Previous post was at 09:19 PM ---------- These are BM644A They are all the same. These are the best there is for lowers. http://www.oldbuickparts.com/catalog/advanced_search_result.php?keywords=BM644A&x=46&y=19 Check out the Inline site under new Olds parts. Scroll down. It looks like you may get everything you need in the kit. Does you year use 4 mounts under the firewall? Make sure you get enough. You need 4 of the rubber plug type which is INL12475 and 2 of the INL1276 for under the doors. There are 8 INL12477 used everywhere else. If you get the kit replace the INL12478 with the BM644A. The inline type have loose washers and are not correct. These mounts are the closest I have found and used them on my car. I think I actually bought the kit from Fusick Olds as it was the same. That might be a better deal. Not the cheapest way to do it but the best.
OK, if I understand this, I need: A) 12 BM644A-2 from Old Buick Parts, since I already have new core support bushings. B) Some number of upper bushings, different part numbers. I can't tell from the InLine Tube picture whether the INL12473 kit is uppers or lower, since I am not familiar with frame bushings. I don't know what the upper bushing part numbers should be. I don't know if my uppers are going to be any good after 46 years in the California smog. I doubt they are good, and how would I tell until I pulled them out? The frame in my '68 is bent, but I bought a rusted '69 4-door that I am going to shorten the frame to fit (and go back to Buick power at the same time). That is, if the frame is good, yet to be determined. Since I'll have the frame off, I think that putting in another $100 or so for the upper bushings is money well spent at that time, rather than going into it again later, with yet more labor. I've never done this other than putting in a replacement core support when I fixed my car after a wreck, about 10 years ago. But that's only two bushings. Based on what I've read, these may not be the good ones. So maybe 14 BM644A-2.
I used the poly mounts , havent driven it yet , but I was happy with the kit and it is holding everything nice and tight. For the core support I used 80' s regal core support bushings which work well!
