Small Block Distributor casting

[LTBurkD]

Guys,

I need some help identifing a distributor in my 68' GMC shortbed. The truck has a small block. The distributor casting number 1111180 is this distributor correct for the truck? I'm trying to buy a mechanical advance curve kit for the truck and there are two varieties (those distributors manufactured before 69' and those points unit manufactured after . . . 69- 74') With the truck being over 30yrs old, and not having the original motor . . . anything is possible.

I know, I know, I should put HEI in this truck . . . I've put a Petronix kit in the distributor already and like the way it performs.

Does anyone show this casting number in a 'Chevy By the Numbers' reference type book?

Thanks in advance for the help.

Dave.