4.1 250 l6 distributors
 

I need a distributor for a 1970 C10 that has a 73 block. Will any distributor from a 4.1 250 l6 work ? Why do the parts places say the one for a 70 model will not work on a 73 ?

Re: 4.1 250 l6 distributors
 

Maybe because the HEI Distributor came into production about that time.
Which is stupid computer logic, since the GM L6 HEI distributor is backwards compatible to the '63 -'72 L6s anyway.
I have a '68 C/10 with a 292 L6. It has an HEI. At the parts counter, I tell the kid it's a '75 C/10 so his computer doesn't seize up. [I have the remote coil low cap style HEI].
The more common coil-in-cap HEI will work fine on a 250.
If you just want a points-type distributor, any unit for model years '63 -'73 will work. [I believe the HEI was optional in MY '73, and standard later.]

Re: 4.1 250 l6 distributors
 

Thanks for the good info. I thought that was the case but I have very limited knowledge on these trucks and I am trying to put this one back together that the PO gave up on.