My first Mopar

LocuMob said
A small spacer will help with that.

I actually went up to a 1" phenolic spacer and it didn't stop the heat boiling issue.

sprue said
Thanks for the advice. I will probably wrap the exhaust to protect the master cylinder from the heat, so hopefully that will also reduce carb boiling too, or is it caused more from the engine heat?

I went to pick up the dart dual master cylinder and it is also too long. Any suggestions on a M/C that's around 6.5" from the mounting point to the end?

My heat boiling was coming from the fact that the heat crossover in the intake passes directly under the carb. With the fuel bowl on an Eddy in the bottom center, that crossover just cooked the gas. With the fender headers, that might add to the problem, but can't say for sure.

sprue said
Its definitely an issue. The long master cylinder is practically touching the exhaust. There would be about a 1/8" of clearance. I did find one that is only 6.9" and is much less expensive than the 6.5" wilwood.
Some pics!

You might want to see what RockAuto has in terms of different master cylinders.