" . . . & It's now a full pressure oil system."
Darrell,
What is now a full-pressure oil system? Your 261?
All 261s were high-pressure ("full pressure") oil systems.
You are putting a 235 head on a 261 block - correct?
If so, did you drill the extra coolant passages in the 235 head to match-up with the extra coolant passages in the 261 block?
