[65blackfleetside]

2nd vote for spaL top of the line fan. Don't waste your money with chinese junk fans.
If you don't have a shroud yet you can make one for less than $30.00 .
Do you have a GFS commercial food supply store near you? They sell the large commercial grade aluminum baking /cookie sheets. One off the shelf fit my new aluminum radiator perfectly and I was limited on space like you. Just cut your hole for fan. mount fan to back of baking sheet with small lock nuts and bolts. The original flange of sheet mounts perfectly to back of radiator. My truck is at the painter or I would post picture. When I show people the shroud they have no idea that it was a baking sheet.