[jeepracer]

Hello all. I am new to the site and to Tbirds so bear with me. I have a couple questions about my car that I really don't want to know the answer to because I am afraid it is going to cost me some big bucks to fix but I need to know anyways so here it goes.

1. The car when drivin more than 20 minutes pushes the coolant out of the radiator into the overflow canister and it seems like it is not over heating but it is causeing presure to be built up in the coolant system. I am thinking it is a head gasket problem but I was just wondering if anything else could be causing that situation? The motor is the 390.

2. How much antifreeze should be in the radiator? I know dumb question

3. The blower motor is not working on the car. Does anyone know where I can pick up the relay for the blower motor?

Thank you in advance for the help.
Gary