3970010-010-020

[copo9566aa]

Last year I sold two 350 4-bolt main Block casting 3970010

The first V0929TWZ C8F1***** =1978 Flint assembly truck block
The second V0212TYZ C6F1***** =1976 Flint assembly truck block

Identical block except one have 010 casting the other have 010 020
casting into their front face, just above the main bearing bore.


010 is 10% Tin and 020 is 20% Nickel

What is the real story about the 010 020 Casting ??
which would be the best for the performance ??

1970 Yenko Deuce have 3970010 block with just 010 casting or 010 and
020 ????
and for a big block casting 512 this is the same story ???

Just curious about this. [img]/ubbthreads/images/icons/confused.gif[/img]