Here is the start of a home made Periphery port housing and a factory
periphery port housing. The outer part of the casting has yet to be cut away.
Use drill bits and die grinders with carbide bits. A piece of exhaust pipe
tubing is formed into a rectangular shape on one end and fitted into the port
with about 2 inches protruding on the outside so as to attach the intake
pipes. The water jacket is poured full of (in my case) Devcon Plastic Steel,
or other such material. The inside of the tube is trimmed below to surface of
the chrome liner so the apex seal is not damaged. If the housing you start
with has a case bolt in the way, (older housings) just cut right through it.
Leave the bolt out but remember to tap and plug the bolt hole in the rear
cast iron to keep the water in the engine. The intake tubes attach with short
bits of radiator hose and hose clamps.

Second try.

Paul Lamar

Paul, it appears that the upper housing is the home made port?
I can still see the water  port on the outside of the housing.
It also appears that the exhaust port has been enlarged some as well.
Royce

Lynn??? Which is which?

Paul Lamar
 
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