Is there a low profile water pump for a 360?

Of course it will (fit that pump and an OEM rad). That's how these cars were BUILT. At least in 69-70 whenever the newer longer pump came out
Yeah the cars had a 340 or 318 and the motor was farther back. If it was back a inch more I wouldn’t have this issue. The engine is all the way back on the engine mounts.