'67 PS stud 5/16" to 3/8" AFR head thread?

[Jonk67]

Ok I'm to the point where I'm adding accessories back to the front of the engine. Tried to mount my PS bracket and found that the AFR heads have 3/8" threaded holes and the original PS long stud is 5/16".

Is there an insert to step up from 5/16" course to 3/8" course, like a helicoil?

Or should I drill out my PS bracket to accept a 3/8" stud? I'll have to drill both ends and the steel spacer, seems like more work than a thread insert but do like the idea of a beefier 3/8" stud. The 5/16" seems awfully thin to support the majority of the wt. of the PS pump and belt tension. The alt. uses a 3/8" bolt.
Jon

 

[Horseplay]

Drill the bracket. You can probably pick up a larger bore spacer at the hardware store to save having to drill the one you have.

 

[65fast]

Ok I'm to the point where I'm adding accessories back to the front of the engine. Tried to mount my PS bracket and found that the AFR heads have 3/8" threaded holes and the original PS long stud is 5/16".

Is there an insert to step up from 5/16" course to 3/8" course, like a helicoil?

Or should I drill out my PS bracket to accept a 3/8" stud? I'll have to drill both ends and the steel spacer, seems like more work than a thread insert but do like the idea of a beefier 3/8" stud. The 5/16" seems awfully thin to support the majority of the wt. of the PS pump and belt tension. The alt. uses a 3/8" bolt.
Jon

I got a set of plugs for my AFR heads that were used as adapters if you needed to mount accessories to them, I bought these heads second hand, but I am sure AFR sells them.

 

[Jonk67]

Thanks, I figured there was something but didn't wait and drilled everything out. mixed up my bolt sizes above working on too many at once. The stock PS pump support stud is 3/8" but the AFR head holes are 7/16" so I picked up some all thread, cut to length and put a sleeve over it to hide the threads in the bracket opening. Came out ok, sturdier I feel. I also had to tap the hole for the upper left bracket bolt that goes through the wp/tc as only the 1/2" of the tc is threaded and was stripped out like normal. I'm using an alum. pump so I just tapped up to the next size (3/8"?) through the pump and tc to the whole ~1 1/2" is threaded for better holding. Now if I can find where I put the alt. spacer I can continue with accessories....

Tapping mount hole with new threads

When I come across a pump without a dented up casing I'll have it rebuilt by Stanger, until then this reman will do. The return line also points up which makes hose routing difficult, I think the '67 is supposed to point straight out or down?

Jon