http://www.lindertech.com/reconinj.htm
Scroll down to the 4.3 Service Kit...$300.
The biggest thing is which side of the motor has the puddle? Drivers side puddle is fuel lines. Passenger side puddle is the CPI fuel pressure regulator.
I'll be checking mine soon because it's getting hard to start and I can smell a little gasoline. If it's fuel lines again, I'll make up some steel braided lines. If it's the CPI regulator, I'll do the Lindertech regulator update since the price is so reasonable and they say the update replaces the poorly designed early stock piece.