I can't tell you for certain on a 383 but one thing I did when building my 440 was go out to Summit Racing and search for ARP sets for my application. I didn't necessarily purchase the sets but the part descriptions were often good enough to determine the needed fasteners.
Another tip: Tractor Supply sells Grade 8 bolts by the pound which ends up being way, way, way less expensive. :-)
Jim
On Sunday, April 19, 2020 at 11:11:02 PM UTC-4, Matt Allyn wrote:
If any knows answers for any of the following; that would be grand!
- Intake Manifold Bolts - I know there are 8. Anyone know the sizes? Some are longer due to the air conditioning brackets.
- Water Pump Housing Bolts - I know there are 6. Anyone know the sizes?
- Thermostat Housing Bolts - Anyone know their size?
- Valley Pan Cover Bar Bolts - I know there are 6 of them. Anyone know what size they are?
- Valve Cover Bolts - I have the 6 bolt covers. Anyone know what size they are?
- Exhaust Manifold Studs & Nuts - Anyone know what sizes are needed? I know at least one of them is longer due to a bracket attaching to it
Thanks!