bbc 512 block suffix numbers?

[ZL1.FUN]

coming up with no luck on two suffix numbers I looked at today,
3963512 blocks suffix 7bj and other 7bk any help would be great

[BARRY]

hi can you post a pic.... mite be pontiac canadian car

[scuncio]

Marine engines.

[Igosplut]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: scuncio</div><div class="ubbcode-body">Marine engines. </div></div>

Just going to say that. I've had a few of those....

[SuperNovaSS]

7BJ is cast iron head L88 from a Marine application. The other is probably a similar unit, possibly its reverse rotation partner?


Jason