The BOSS 302 Registry

Block

The heart of it all. The block. Casting numbers on BOSS 302 blocks should be C8FE-6015-B for 1969.   We have heard of C8FE-6015-B used on very few early 1970's. We have heard of D0ZE-6015-A used for a few late 1969's. D0ZE-6015-B or C for 1970. Ford did make ONE prototype 1971 BOSS 302 Mustang and then the 1971 program was canceled. The D1ZE tooling was already cut so D1ZE-6015-B was used for service blocks.

Not only was the D1ZE-6015-B utilized as a service replacement block, but additionally the D0ZE-C and the D0ZE-B were used for service as well for the '70 Boss, depending on when the replacement took place. The C8FE-B Tunnel Port blocks were also utilized as service replacement blocks in 1969.

There are "urban legends" out there that suggest there are other BOSS 302 blocks with part numbers C80E-6015-B and C9ZE-6015-A or B. We are not aware of any in existence. But, never say never. If you have one, let us know and we'll re-write this again.

If you are looking to replace a block and numbers matter to you then the key is to look at the part number and the date code on the block. Use a block that is date coded before the build date of your car. We frown on V.I.N. stamping a replacement block and it just might be illegal.

Model Year From the Factory Service
1969 C8FE-6015-B C8FE-6015-B
late 1969 D0ZE-6015-A D0ZE-6015-A
early 1970 C8FE-6015-B

D0ZE-6015-A

D0ZE-6015-A

D0ZE-6015-B

D0ZE-6015-C

1970 D0ZE-6015-B

D0ZE-6015-C

D0ZE-6015-B

D0ZE-6015-C

thereafter D0ZE-6015-C

D1ZE-6015-B

Note the BOSS 302 block features in this photo. Four-bolt main bearing caps, screw-in freeze plugs. Also note the location of the casting numbers hidden by the starter when completely assembled.

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cast#.jpg (42406 bytes) Casting (part) number on top

Date code underneath

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This page last updated: January 02, 2015