L31MaxExpress
I'm Awesome
There is a capped port on the adapter, but I have never chased its souce to know if it is on the filtered oil side or not. I never have looked at the adapter that closely either to know if the oil cooler supply is filtered or not. Personally I would pull it off the fitting in the block 2" above the oil filter, I know it is filtered. Move the sending unit to the port behind the distributor if it is in the lower port currently. I prefer the later TBI/Vortec style 3 wire sending unit/oil pressure switch myself vs the large single wire pressure sender canister and seperate 2 wire pressure switch on the earlier TBIs. My 83 and 87s have both have had the 3 wire sensors retrofitted. The 83 got it when it was carbureted and I used the fuel pump switch portion as the choke power supply. I had replaced the stupid choke switch like 3 times before I figured out that I could use the newer sending unit. It is one less sending unit to leak. I returned oil to the fuel pump block off plate on a Amsoil Bypass setup. Got a thick aluminum Moroso block off plate, drilled and tapped it for a NPT thread.
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