for either sensor to work you need MAF translator so why even consider LT1 -3" sensor when you can use bigger 3.5" LS1 MAFfor extra flow ,I think our cars run the best on LS1 until you go realy big with intake piping /turbo / throttle body , I used LS6 ZO6 ( no screen ) plastic sensor with my Big Mouth 4" intake and I loved it even more .
I have a 3.5" LT1 sensor I had left over from a friends 95 z28, I have a 3"LT1 sensor on the car now until I buy the 3.5" maf pipe. Both sizes from LT1's. I don't know which is better- LT1 or LS1 but I know the LT1 sensor work good and they both read higher than stock.