I just recently installed a new radiator due to a leak in the previous one and the new pressure opened some sort of a seal on top of the housing of my 12A. It pools up before it falls anywhere, very close to the carb. What is the best thing to do in this situation without spending much money?

 

Probably just the o-ring that seals the intake manifold to the coolant passage in the housing. The intake has coolant passages so that it stays warm and won't freeze during the winter. If the leak is between the manifold and engine, this is almost certainly the problem. You just need to pull the intake manifold and replace the gasket and o-rings.

Could also be the heater hose in that area leaking and dripping down.

Hopefully it is not actually between the housing and iron.

 

If its between the housing and iron you might want to go ahead a rebuild the engine since you will have to crack it open to fix this problem.