1521 - Steel flywheel Chevy 168 tooth

Fits GM 10.5, 11", Ford long style patterns 1 pc. Rear main seal 33 pounds Internal balance 168 tooth ring gear Meets SFI 1.1 specifications Made in the USA

Fits GM 10.5, 11", Ford long style patterns 2 pc. Rear main seal 33 pounds '400' balance 168 tooth ring gear Meets SFI 1.1 specifications Made in the USA

Fits GM 10.5, 11", Ford long style patterns 1990-up 1 pc. Rear main seal crate engine Steel crank 41.7 oz/in balance 33 pounds External balance 168 tooth ring gear Meets SFI 1.1 specifications Made...

Fits GM 10.5, 11", Ford long style patterns 1 pc. Rear main seal 33 pounds External balance 168 tooth ring gear Meets SFI 1.1 specifications Made in the USA

Fits GM 10.5, 11", Ford long style patterns 2 pc. Rear main seal 40 pounds Internal balance 168 tooth ring gear Meets SFI 1.1 specifications Made in the USA