Thanks guys I was hoping it would have been just a wee bit bigger diameter - My screw holes already in there right now are 3" apart - the old fixture was ~ 4 x 2.
Edit - I found this - I'm sure they are all the same size, but this is the only one I found where the size is actually spec'd
(also found 60's Jeep which is 3-3/4, but would require a pretty big hole to accommodate it)
Last edited by D'Ecosse; 04/24/202311:34 PM.
'51 Chevy 3100 Truck - OEM 216 Engine; three speed column shift transmission 6 Bolt disc conversion with dual master/vacuum booster 12V alternator conversion. 235 engine in waiting