[tx65coupe]

My friend just did this on his 68 with no issues, so I'd say you would be fine., since both are square bore carburetors. This really seems like a great carburetor and I like the idea of annular boosters. His car seem to run better than it ever has before and also has greatly reduced tailpipe odor. After seeing his first hand experience with that carburetor and reading some posts here about it, I have been tempted to do the same thing and swap out my 1806 with the SUM-M08600VS.

 

[tx65coupe]

Right now there are four filters between the tank and the carb. That fuel going into the carb better be clean!

That must be a record. I've heard of having an additional filter but never more than 2. Sounds like you need a new fuel tank.

 

[tx65coupe]

My buddy said the same thing about the fast idle being particularly difficult to adjust on this carburetor. I guess maybe the base gasket could be leaking, but don't think he had any issue with that. Edelbrock makes a similar one that I have under my Edelbrock carb that would probably also work. Did you have that on your previous carb, maybe try it. I would not put any sealant on the carb base. Maybe it just wasn't snugged down enough.

 

[tx65coupe]

Maybe the transition slots are too exposed. Ideally they should only be barely peeking out.

 

[tx65coupe]