Page 31 of Hays Performance Clutches & Flywheels 2008 by Prestolite Performance
performance flexplates chevrolet early chevy small block 1957-1985 v8 big block chevy 1965-1990 396 427 o.d.14.23 168 teeth without counterweight all hays flexplates meet sfi specifications 29.1 #10-010 early chevy small block 1957-1985 with 2 piece rear seal o.d.12.85 153 teeth without counterweight #10-012 chevy small block 1970-1980 sbc 400 and external balance 383 o.d.14.23 168 teeth with counterweight #10-015 early chevy big block 1970-1990 454 o.d.14.23 168 teeth with counterweight #10-020 late chevy small block 1986-1997 with 1 piece seal o.d.12.85 153 teeth with counterweight #10-024 late chevy small block 1986-1997 and 383 with 1 piece rear seal o.d.14.23 168 teeth with counterweight #10-025 late chevy big block 1991-1997 gen v gen vi with cast crank o.d.14.23 168 teeth with counterweight #10-026 buick buick big block 1970 1976 v8 455 o.d.14.00 166 teeth with counterweight pontiac pontiac 1967 1976 v8 326 350 389 400 421 428 455 o.d 13.96 166 teeth without counterweight #15-075 #13-065 29
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