I am not too that bracket will fit in our Buicks. I went with an American powertrain mounting bracket I got off of Summit Racing. https://www.summitracing.com/parts/awr-hmun10001sr I was a bit tied up at work but it worked out fine using the existing firewall plates. No firewall Flex. @moleary Heres the update! The Hydraulic throwout bearing also works great. The pedals line up where they are supposed to. I also got all teh necessary hardware from @ToddsGS . I got the boot for the console and the floor. Bolts and even the clutch neutral switch and harness. All of the parts worked great together. It does bring down the cost versus buying a full kit that still needs to be modified. I do need to swap out the shifter stick out for the orginal one since the shop mixed it up and put the spare chevelle one I had laying in the trunk. I am happy with the conversion. I used a Centerforce Dual friction clutch and a billet flyheel from TA Performance. I am currently waiting for the 8.5 rear I found to be built. I am adding 3.42 which should pair up pretty well with the M20 and the 28 inch tires I have.