I have ARP 7/16 thread torque converter bolts. I had to grind the heads down to get some clearance. I have .050" clearance between heads of bolts and block. I am using a Mazeire billet flex plate. I kept cracking the B&M, and Mopar performance SFI flex plates. Mazeire flex plate has been good for over a year.

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Last edited by Dartsport540; 04/09/22 07:12 AM.
548 cu. in., Bill Mitchell Aluminum Block, CRT 727 auto trans, Alston Chassis. 8.981et at 149.46 mph. 1.204et - 60 foot, So Far....