Does anyone know what other reservoirs are interchangeable with 4th gen master cylinders? I put a 4th gen master on my 2nd gen, but the angle of the firewall is different and I'm worried about that wedge shaped reservoir not holding enough fluid and starving the front side.

I know the reservoirs can be removed (since they are sold seperately) but do other GM units interchange? Seems like the trucks have larger ones, but I don't know if they mount the same..