One thing I've done in similar situations is to have a machinist drill
into the threaded hole and drill into the non threaded hole (where the
bolt slips through on the header or intake). He/she only needs to drill
about a 1/8" down on each mating surface. The hole needs to be large
enough to insert a piece of tube about 1/4" long. The tube should be a
snug fit in the holes on the OD and be the same ID as the original holes.
Do this around 2 different holes and you have dowls that match up to the
bolt holes. This makes gasket porting (matching the porting to your gasket
very very easy and you are guaranteed the pieces will line up when bolted
on. Hope that made sense. Usually this is very cheap for a machinest to
do. Heck you can even do it youself if you are careful.
On Wed, 13 Feb 2002, Williams Grant Civ Det 2 418 FLTS/ENQA wrote:
> To all,
> Both Chevy and GMC OEM inline engines use rings to align the intake manifold
> to the head ports. Since the exhaust is married (bolted) to the intake, it
> too is aligned in the mounting process.
> Question: Does anyone have stories (pro/con) regarding the aftermarket
> intakes that do not use the intake alignment rings?
> I'm almost ready to install 4 brl carb intake and Fenton headers. Since
> most performance applications suggest match porting, I'm concerned about
> matching up the head ports with the new intake/exhaust setup.
> Albuquerque, NM
> 50 GMC 100
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959