Johnny5

iTrader: (2)

Is there any difference between the Import EFI "All" kit and a domestic one?

I know a guy selling a kit that was barely used with a heater and need to know if it will work OK on a Fbody.

http://www.nitrousexpress.com/Pages/ImportStage1.htm

AND Is it possible to use that as a base for a MAF kit and how much to upgrade?

Nitro Dave's Nitrous Outlet

iTrader: (25)

The only difference in the kit is that the import has a fuel T and clamps you will not use.You will need to purchase some jets..

Yes you can upgrade to a maff kit.The maff upgrade is around 339.00.
Dave

Johnny5

iTrader: (2)

He said he has all the jets. Are they different between import / domestic? I guess he has all the way up to 150.

Do I need something different to get fuel off the rail (test port)?

NXRICKY

iTrader: (1)

If he has an import kit, then the jetting stops at 75hp. You would need more jets, and to convert to a maf kit, you would need the NX109 MAF conversion, comes with all the jets needed, MAF ends, and the correct hoses.
Ricky