yup need one. Cant really have a GM 3 bar because I have the newer style TB where the map is mounted to it.

BUT..............If you have a cheap GM 3 bar or a 2.5 bar Motorola I can trade tb's for my lil bro's older tb.

I know shipping on these is only 1 or 2 bucks but needless to say, please include shipping in price

 

I have a aem 3.5 bar map sensor. I used it less than 2 hours on a dyno before switching for a 5 bar. 70 shipped and it's yours.

Fyi you don't need to swap tb's just leave your stock map sensor on there and don't plug it in of course

 

I got a GM 3 bar with pig tail
$40 shipped

 

I have a gm 3 bar to let me know.

 

So do I get the vacuum source for the new map from T'ing off one of the ports on the IM?

 

yeah just tap it from another source from the IM. then its all gravy.