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Typically the passenger side manifold will have a provision for a choke tube to feed warm air to your automatic choke and the flange on the down pipe will be machined flat to accept a flat gasket between the manifold and the "Exhaust Heat Riser Valve". The valve will be machined on the bottom to accept the "Exhaust Donut" and down pipe.. https://www.paragoncorvette.com/corv...talog/c3/#62/z
Where does the "standard old cast manifold" you have dump? If you're going to have to modify your header pipes anyway to accept the other "Rams Horn" manifold, how about jumping to these manifolds, 162S-L & 162S-R... http://www.castheads.com/corvette_systems.php
They flow as good as it gets from a rams horn manifold and most will never be able to tell what you've done.
The car is a right hand drive conversion, which maybe why the right side manifold is not a rams horn. Although there seems to be enough room for one.
The current right side exits at the back of the block, which means it runs really close to the firewall.
My aim is to get a bit of separation between the exhaust and firewall to ease the heat flow into cabin. Returning to a more original exhaust on the right seems like a good solution.
Just checking that there is no gotchas between the sides that might catch me out.
It looks to me like the ram's horn should give you more clearance for the steering rag joint. The rams horn goes up and then down, while the log exhaust manifold is hung below the spark plugs. Maybe they did that for more clearance for the air conditioning compressor. Lou.
09-27-2014, 05:45 AM
68, 327 ram's horn manifold
