My suggestion is to go with an
EFI Connection LS1 ECU Conversion
It's some $$ - but if you get enough calls and folks willing to pay - you could do the conversion in house and then tuning as well. Now that would rock!!!
Otherwise most LT1 guys now go with
PCMForLess.com and a mail order tune or they are in NC if folks want to drive.
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1996 Z-28: Bolt-Ons, Harwood Cowl Hood, 18" Black Z06s
2005 Subaru Legacy GT - Stage 2 - My DD
2012 Audi S4 - The Wifee's Ride (Wait - the wife drives the fastest of the stable?

)