Well, just had a guy come look at a sbc 1pc rms long block I have for sale locally and I expected him to check some stuff. He asks for a tape measure and measured the bellhousing and spacing of the bolt holes on the oil pan, both sides.
Then said he needs to check some stuff and he'll get back with me.
Oh, and he already told me this was to replace a sbc that he already installed and it cracked.
Of all the **** he could have looked for the spacing on the bellhousing and oil pan bolt holes was the two things he felt was most critical.