This listing is for an automatic transmission 168-tooth flex plate and bolt set. P/N FRA-100 + S-1129. Flex plate specifications are as follows OUTSIDE DIAMETER: 14.13" TEETH: 168 BALANCE: Internal / Neutral (without weight) SAFETY RATING: OE-replacement (not SFI-approved) This flex plate has a dual torque converter bolt pattern to accommodate 10-3/4" and 11-1/2" torque converter bolt circle patterns for the TH350, TH400, and 700R4 automatic transmissions. This size flex plate fits many Chevrolet-designed V-8 engines available in many Buick, Cadillac, Chevy, GMC, Oldsmobile, and Pontiac passenger cars and pickups. Fitment includes the following Chevrolet engines: CHEVROLET SMALL BLOCK V-8: 1975-76 262ci 1979-82 267ci 1976-85 305ci; with 2-piece rear seal 1968-73 307ci 1968-69 327ci 1968-85 350ci; with 2-piece rear seal CHEVROLET BIG BLOCK V-8: 1968-70 396ci 1970-72 402ci 1968-69 427ci