Hi everyone! Since my last posted, I've moved, put my Volvo 122 in long-term storage, and continued to work on a ship...which is why I'm asking a quick question about the Amazon heater cores.

I've put a newer engine in my Amazon and it runs a higher pressure cooling system than the original (about 18psi).

a) How robust under pressure is the Volvo heater core? Should I have a used one cleaned and pressure tested and be done with it?

b) What are the dimensions, should I instead choose to squeeze in a heater core from a newer vehicle (or have one custom built)? Hopefully someone has a spare heater core in their box of goodies (LxWxH, and distance between the outlets).

I'm about 2500 miles from my Amazon, and when I get home I'm just going to have enough time to pull the heater case and put it back in with something that works; or put the pieces in a box for my return in September (by which point I'd like to have a chance to do the brakes and exhaust and maybe put it on the road.

Some have suggested that I simply use a lower pressure cap on the 240 radiator (well, pressure tank) that is on the car; others have suggested I return to a B20 motor. I'd prefer not to under-cool a modern engine that was designed to run at 195 degrees; and the previous owner's sawzall has pretty much eliminated any chance of going back to stock. :/

Thanks for your help!
Ben