So I discovered I had a small exhaust leak on my 66. Turns out the intake manifold has an EGR vent but the riser plate and gasket weren't covering it completely. (See pictures below). I think the gasket was covering it ok at one point but got cooked and started leaking. I have a Holley 600 cfm on the car and I cant seem to find a spacer plate that covers the EGR vent on the intake 100%. The spacer plates i'm finding just aren't wide enough.

Obviously I don't want to change the intake if I...

EGR intake manifold with spacer plate leak