needing temp sender help.

[misternash2]

ok guys coulda, shoulda, woulda. i put a 5.3 in my 85 chevy pickup and i since i did it pretty much in one weekend, i didn't look far enough ahead. what i should have done is drill and tap the right head 3/8 npt to fit the stock sending unit. what i did was drill and tap 1/4 npt thinking that it would be no problem finding a sending unit that was 1/4 npt. of all the gm cars and trucks made, surely they put one in something, right? well, not that i'm aware of. my local parts guy tried to help me, but couldn't. i'm just happy he tried. more than i can say for the "better" parts guys in town. they pretty much blew me off.

so in short, i'm looking for a sender that will communicate properly with the guage set from a 91 suburban that's 1/4 npt.

yes, i know i made a mistake. all the same, i don't want to pull the engine to drill and tap 3/8. (i've got a factory air truck and it's close to the dryer/airbox area) thanks in advance to anyone and everyone who can help.