from crank centerline:
outside of PS pulley 11 3/4"
outside of the alternator body 12 1/2
all measurements +/- 1/8"
The original p/s reservoir extends ~ 4" past the outside edge of the PS pulley - but the pump itself is common to many 2000 up GM products - and can be swapped for a pump (change the pulley) out of a vehicle that has a remote mount reservoir.
If the engine compartments are similar in width between a 47-55 and the 37 - then it will fit.
Last edited by efi-diy; 06/22/17 01:32 PM.