Hello Charles
My alternator in my cal cruising 46 came with a 120 amp alternator with the Perkins 4.236
I replaced not with a 180 am leece nevil
Alternator without making any modifications
Try a leece nevil 180 amp
Mine came with a double pulley set up
Good luck
Edwin
Sent from my iPhone
Hi I have added12volt fridge unit and wouldl ike to get abit more from my alternator. I would like to stick with the small frame size. Now have a Bosch AL 530 about 60 amp rating. I mesure ab0out 40 with a clamp on meter.