What is a 361 big Block ?

What year is your block & what's you're pistons ?

It's been literally 20 years or more, but IIRC< it was a 1965 Dodge 2 1/2 ton fat bed. I got a kit back then, for a 400 block bored .060 over with the 440 stroked crank for the 400 block. It might have been Muscle motors? I remember having to do a small amount of grinding for some of the crank throws, IIRC, it was around the oil pick up area. I seem to recall that I drilled out the oil pick up for a larger pick up, then had to do it again when I ground the clearence for the crank throws.
I have just purchased a new crate motor to replace this one FYI.