A-833 casting number ?

[750-h2]

I have seen casting numbers with H3 and others with H4. Can anyone tell me the difference and what is the meaning of the 3 and 4. I am pretty sure @6bblgt would know. Thanks

[6bblgt]

never noticed the "H3" VS. "H4", maybe an earlier version (does it have a VIN pad?) or a mold number ?? 

but, the paint stamped "605" is a 1969 B-body 18-spline  what's the partial VIN on it?

[750-h2]

Thanks Dan @6bblgt . I was looking at an 18 spline with an H3 and a VIN pad. #'s next to impossible to read very rusty . Its suppose to be out of a V code 1970 Runner. I was just wondering about the 4 versus 3. I googled it and couldn't find anything about these #'s.  Looking at A-833 pics on Google the 4 or the 3 do not seem to have anything with the year of the car?     

[Shoooter]

never noticed the "H3" VS. "H4", maybe an earlier version (does it have a VIN pad?) or a mold number ?? 

but, the paint stamped "605" is a 1969 B-body 18-spline  what's the partial VIN on it?

I got one with 133374 build sept 24 1969. Put into a 70 car