,TH350,TH400 700R-4 converters. 20230 Chevy V8 internal 168 tooth to 85 ... . . . . . . . . .$69.99 20232 SB Chevy 400 to 85 ... 75.99 20233 Chevy 454 90-earlier ... 69.99 20237 SB Chevy internal 153 tooth to 85 ... . . . . . . . . .$69.99 20238 SB Chevy external 153 tooth 86-94 ... -94 . . . .$79.99 Heavy-Duty Flexplate-Chevy Hays Heavy-Duty Flexplates for high ... ,1955-1985. 10-015 Chevrolet 400 Small Block Detroit (External) Balance 168 Tooth. ... 10-020 Chevrolet 454 Big Block Detroit (External) Balance 168 Tooth, ... earlier. 10-024 Chevrolet 400 Small Block Detroit (External) Balance 153 Tooth, ... 1986-1994. 10-025 Chevrolet Small Block Detroit (External) Balance 153 Tooth, ... 1986-1994. 10-026 Late Chevy Big Block 1991-1997, BBC Gen V Gen VI with Cast ... with counterweight 13-065 Pontiac 1967 1976 V8 326 350 389 400 421 / 428 455 O.D. ...