My local radiator shop has advised me to consider a replacement or recore of the radiator in my 1942 tonner (122" WB).
It has a 21C-8005 in it and I can order a reproduction from Brassworks with a three-row core. I think the four-row core would be too thick to fit at 3-1/2 inches.

the Green Bible indicates that my truck could use the 21T-8005 for "extra cooling." Do any of you have information or advice on the difference between the 21C and the 21T? I am guessing that the Brassworks four-row option is a replacement for the 59T which will not fit my truck.

Thanks, Norm

 

not sure of the difference! but they had different hose diameter. i got 1 3/4 inch on my truck,and i think there,s 1 1/2 inch for pickups.

 

 

I'm running a 4 row Brassworks radiator in my '39 p/u with an 8ba. Lee at Brassworks was very helpful with measurements, advice, etc. Can't ay enough good things about Brassworks. I had to adjust the radiator a tad bit forward but that was it. IMO you can't have enough radiator in a flathead so my vote is for the 4 row if you can make it fit.

 

 

I am using a radiator in my 1/2 ton woodie that came from a '48 1 1/2 ton. It has a 59ab .I would think that it may be 4 rows. Where do I look for the part #? I have done a lot of mixing and matching of radiators in my jailbar fleet, as most of the ones I buy have had the radiator stolen before I got them. I hope to have some time at lunch to do some investigating for you.

 

 

Here's what I found.

47 half ton woodie conversion has an 8RT radiator The steel frame of the radiator is 3 1/8" wide. I will guess 3 rows because in the front, the core is 1" back from the frame. On the inside, the core is 1/4" back from the frame. Quick math says the core is 1 7/8" thick. The fan is 2 1/2" from the core. Has the small necks at the top for later flatheads, so I have double hose on them.

47 tonner tonner PU with a 59ab currently has a thin aluminum repro radiator that was in when I got it, but has 5 1/4" between the fan and the core. I have a 21T that will go in soon. The 21 T is also 3 1/8" wide frame, but the core is flush with frame, front and back, so core is 3 1/8" thick. 4 row?

47 2 ton has a 59T with 3 1/8" frame and core flush both sides. Fan is 2 1/4" from core.

47 tonner panel has 59 ab engine, 21T radiator, 3 1/8" frame, and 3 1/8" core. I'm sure it would have 2 1/4" from the core to the fan as well, but I took it's front clip off a truck with a six cyl, so the rad was mounted in the forward position and I installed it that way on the panel. It has about 6" from the fan to the core. If it ever overheats, I may move it into it's rightful position, but for now it makes great access to the distributor and belts.

In review, the 4 row radiators look to be set at 2 1/4" from the fan and the 3 row, having the 1/4" inset at the rear has 2 1/2" to the fan. Looks like you will lose 1/4" of fan clearance by going to the 4 row. I say do it, but ask Brassworks if their 4 row core is also 3 1/8" thick. I'd love to come see your truck. I sneak off the island at least once a month for lumber runs.