LS29 or?

[Berg]

I think what you may be referring to isn't an LS29 but an L29 as in the 1996-2000 Vortec Gen 6 454 and 502 style engines with the multiport fuel injection that uses a dry plenum. If this is what you are referring to, instead of using a truck setup do yourself a favor and find a Gen 6 454 marine fuel injection setup used and get the MEFI 4 computer and harness. It will be a total stand-alone system and all the wiring is already simplified for your application. There are guys out there like Blackbear tuning that can custom-tune the computer to optimize your combo. As far as fuel injection systems go- this is a cheap alternative to some of the Ram-Jet and Holley kits out there. I have seen the whole intake, injectors, wire harness, and computer go for around 700. Keep in mind you still need high pressure fuel injection line/hose and a pump that can support it. There are companies that make replacement Chevelle tanks with the sump and pump already installed.