It is. I was looking it over Thursday and for some reason, I don't know what I started thinking I need to look it over real close.
I want to start at a 4.125 bore of I can. So I looked through a freeze plug hole and it's not a Siamese block. The cylinders are .030 apart. I'll sonic check it later.
Then I started thinking about it and every R3 I've done did NOT have the dry sump lifter valley. Then I started getting nervous. It has an R on the front and an R3 on th bell housing but it's not like any R3 I've done.
Then the panic hit because I tried to find the casting number and not a single book I own has that casting number listed. I do know it may have a part number stamped under the casting number, but I forgot to write it down but I do know when I looked it up, I couldn't find it. Evidently the last 3 digits is what counts.
