It was pabloconrad who said this. This is a list of things he told me to make sure I did, and I knew about all of them accept the one I mentioned (which I didn't really make clear as to what I was asking)
pabloconrad said--
""Several things to consider when upgrading to the 3.4L:
1. If you go with the Weber Carb, you need to get an electric fuel pump that puts out no more than 3.5 PSI. If you can't find one, then buy a Holley fuel pressure regulator with by-pass, or one with two outlets.
2. You need to install an oil pressure switch so when you lose it, the fuel pump shuts off and you protect your engine. With that in mind, you should install a momentary by-pass switch in case you run out of gas. That way you get fuel to the carb.
3. Your flex plate off the 2.8L needs to neutrally balanced as the 3.4L is balanced on the crankshaft and the 3.4L is a three hole rather than four. I just bought a new one for the 2.8 as the teeth were wearing out and had it neutrally balanced.
4. Although many people say the oil pump and the oil pan should be swapped from the 2.8 to the 3.4, they are identical and it is a waste of time. Keep as spares, especially the oil pan. You never know when you're going to hit that too tall rock.
5. Replace your motor mounts, belts, hoses, and clean the inside of your bell housing while you have a chance. Double check everything else as you tear it down.""
#4 is what I was wondering about. I don't understand why I would need it.
Eagle-"If you're out of gas, how are you going to get fuel to the carb by by-passing an oil pressure cut-off? Doesn't make sense to me. "
I was wondering the same thing...