1972 455HO Intake Manifold Bolts/Studs What style and placement?
 

Could someone please answer a few questions about the correct style/placement of the intake manifold bolts/studs on a 1972 455HO.

1. What style bolt would be used in the positions that only use a bolt.

2. Approximately how far from the cylinder head should the studs extend that attach the intake/crossover? These are 3/8-16 thread where the washer/nut would go on them aren't they?

3. Not sure my diagram of the placement of the fasteners is correct.

Thanks is advance-Kyle.

Hey Kyle:

1) Style "C"

2) See attached photos. 3/8"-16 is correct

3) Your diagram is dead-nuts on.

4) Note that some of my fasteners are incorrect (ARP) pieces.

Hope this helps, and Merry Christmas!

Some pics of my HO

Last pic is of an original base bracket. I modified mine to closely resemble that piece. Norwood has repopped the piece that goes b/n the studs, a 72 only bracket between the washers on the pass side. Note the original paint on the driver side crossover.

Thanks for the information and the photos.

Resurecting an older Crossover Thread
 

I am in search of the correct studs that attach the crossover (1972 455HO) to the intake/heads. I believe they are GM part # 483820 and identified as a 3/8" x 16 x 2 15/64" stud. (4 required). I have searched on that part Number (to no avail) looked at Fastenal, AMK, and two other Hardware distributors, but can't seem to locate a threaded stud with a tapered top (as shown in Pat's photo) - attached.

Does anyone know of a source for this type of stud. I am trying to be as exact as I can be in this restoration.

Thanks
1972 Goat Herder

Ames Part Number FN495M.

Perfect! Thanks BWB. Just put in my order.