G'morning!
Hopefully a solution to your problem.
The original part for your '60 235 is listed in the Chevy Master Parts Books as Group 1.656, GM# 3756605, Oil pump intake w/suction pipe. It is threaded into the oil pump and is listed as fitting all 1959-62 Chevy 235's.
There is an
NOS GM# 3756605 currently offered on evilbay for what looks like a decent asking price. Look at the pictures in the ad. It shows the threaded end you need, so hopefully this can make your search short and sweet.
PS - I've moved your post to the
Truck Parts Wanted forum as that's where it fits best.
