TPIMonteLS

iTrader: (1)

Looking for a vac fitting for a plenum, unsure if they are all the same but this is for the furthest front on a 90-92 unit, if that matters. Or if these are available elsewhere I'd be all ears.

Tuned Performance

iTrader: (92)

If your looking for the map or fuel pressure fitting use gm 14082470

TPIMonteLS

iTrader: (1)

Thanks for the part number, didn't think it would be available yet but I suppose it was used in many other applications possibly. This is for the fitting in front of the MAP/fuel pressure though, I think the forward most fitting is used for cruise on the 90-92 plenum although I was assuming all three are the same size.

Tuned Performance

iTrader: (92)

If I recall correctly the hvac fitting is slightly larger od nipple. The 14082470 is still available and has a list price of $6.15.

TPIMonteLS

iTrader: (1)

Went out and looked, how it's in there now is the smaller nipple (FPR) and larger (HVAC/Cruise), with a bolt in the front. It was bought used a long time ago with the bolt already in, so maybe they moved the HVAC/Cruise fitting to the back. Either way, the part number you gave is for smaller so that'll work. Now to find a decent price for it, probably not anywhere to ship due to the price of it.

Tuned Performance

iTrader: (92)

If you don't have a chevrolet dealer near bye the cheapest bet is on ebay.

http://www.ebay.com/itm/LT1-LT4-Vacu...fe8802&vxp=mtr