When I converted my 1960 Falcon from a 2.77 transmission to a 3.03, I moved the engine forward 5/8" to make the top bell housing bolts clear the firewall. I got this idea from FEandGoingBroke and I'm sure glad I listened to his advice.
Even after moving the engine this far, the top, driver's side bolt was only 3/8" from the firewall. This was alright for the bell housing bolt, but my radiator was 1/4" from the fan. This worried me, so I moved the radiator forward, by altering the mounting flange, where the radiator bolts up. The photos below shows what I did.
This photo shows notches that I cut from the top and bottom of the mounting frange, on both sides. I used a hack saw to make two cuts for the notch and broke the notch out with vice grips. I then smoothed out the edges with a file. These notches allowed the radiator to be slid down in front of the mounting flange. I added a few flat washers between the flange and the radiator. This gave me about 5/8" clearance between the radiator and the fan.
This photo shows the top passenger's side, with the notch already cut out. The RED arrow shows the original location of the radiator, and the GREEN arrow shows the new location, making it closer to the front, and further from the fan blades.
This photo shows the bolt, at the bottom of the brace, in front of the radiator. I used a shorter bolt here, so it wouldn't hit the radiator.
This last photo shows the radiator in place, on the front side of the mounting flange. Problem solved.
Even after moving the engine this far, the top, driver's side bolt was only 3/8" from the firewall. This was alright for the bell housing bolt, but my radiator was 1/4" from the fan. This worried me, so I moved the radiator forward, by altering the mounting flange, where the radiator bolts up. The photos below shows what I did.

This photo shows notches that I cut from the top and bottom of the mounting frange, on both sides. I used a hack saw to make two cuts for the notch and broke the notch out with vice grips. I then smoothed out the edges with a file. These notches allowed the radiator to be slid down in front of the mounting flange. I added a few flat washers between the flange and the radiator. This gave me about 5/8" clearance between the radiator and the fan.


This photo shows the top passenger's side, with the notch already cut out. The RED arrow shows the original location of the radiator, and the GREEN arrow shows the new location, making it closer to the front, and further from the fan blades.


This photo shows the bolt, at the bottom of the brace, in front of the radiator. I used a shorter bolt here, so it wouldn't hit the radiator.


This last photo shows the radiator in place, on the front side of the mounting flange. Problem solved.