NEW SWS CHEVY ALUMINUM BELLHOUSING, GM 621 3899621 REPLACEMENT FOR SBC & BBC FOR 11" MANUAL CLUTCH APPLICATIONS

Fit better than the original.

a perfect fit no run-out on center you gear heads know what i mean or i hope you do/ if the center is not as it should be you will have issues with clutch and transmission aliment

Buyer beware! This bellhousing is machined wrong, .048 run out for starters, bought .021 Moroso offset dowels to try to bring it in specs, ran out of room in the mounting holes, then also discovered dowel pin holes were machined .006 too large for any dowel pins any way.It would never stay zeroed no matter what you did. Southwest speed will not answer any emails , also found their warranty/ return policy printed on their website, it says basically no returns on any speed parts for any reason. So I just purchased a nice piece of 200 dollar scrap, unlike them I will not sell it to anyone, but will throw it in the trash where it belongs

For my husband, he loves it. My husband loves every truck part ever made and not created yet. Thank you Amazon, he's rebuilding his 64 Chevy

Received my new bellhousing 2 days late , but not a problem. It looks great , going to get my mechanic to install it on my M-21 transmission im getting back after a full rebuild. Found out that the previous owner had put a truck bellhousing on the transmission and was Jerry rigged together with no pilot bearing. Like who does that. Anyways, can't wait to put it back in my Z28.