That fancy dancy gas vapor thing can make 'em stink like a deadead cat is in there.
Once again the De-smog was choice for me.
Excess crankcase pressure can can leaks too. Proper venting is important.
Mimi just blows it out 3 different vents.

What carbs(s)?
Today was a nice day. Great weather for the track.
Chased a MGB race car and a M5 BMW ( driven by Instructor)
for a neat experience. We was scooting.
Fun and instructive.
The MGB-GT behind me has the twin cam Toyota engine and a 5 speed box.
How about a MGB-GT with a 454 Buick engine.
Saw a 40 something Dodge Coupe with a Corvette engine and chassis
haul arse. Rusty and just plain off the charts...it was fun to watch.
A Porshe 911 something that was sooooo loud and sooooooo fast.
WOW. Red.
A 1960 Damiler made in the UK . Two seater with a Hemi V-8.
A British design. Dang thing had tail fins.
Mimi did fine and the suspension set up is UBER nice in transition.
The new tire/wheel combo is sticky.
I like the new SUs.
It's probably slower than a Pinto but it is fun.
Dan, good luck. Sounds like you have plan.