My (rather painful) record was at the end of a long whitewater slalom course at the World Masters in 1998. I was 52 years old. Approximately 200 bpm. I wasn't sure I was going to survice, but at least I won...
Coolers are non-directional but oil filters have a check valve to prevent reverse flow. Plumb them backward and you get no oil pressure or flow. In a filter, oil always flows from the outside into the center.
I've got a very crude DWG 3D model of a 302 that includes the engine mount bosses (and some other stuff). Some of the surfaces are missing, but that shouldn't effect what you need. E-mail me at [email protected]
The temperature variation from side to side is way too much. Measuring the temperature of each pipe near the head will isolate any cylinder that's weak. Something's not right, either mixture-wise or even no ignition at all.