Idk, I can tell you this at idle before it warms up if you pop cap and look in its flowing fine and there's no pressure. No fluids mixing anywhere and runs fine. Timing and fuel are now spot on. I just suspected it was not enough rad, this is the 3rd stroker I've had and they run warm. Doesn't help its 11to1. And has 630" lift and won't idle below 1000rpm. When I drained rad it just didn't seem to hold alot of coolant, only other thing I can think of is maybe they partially filled block?
