My 1950 F-1 started with.... 2 numbers, 2 letters, a star, 6 numbers, a star, 2 letters from what I understand the last 2 letters are where it was build SP is for Saint Paul

 

so i finally made it home to check for the serial number location weteen the motor mount and radiatior and theres nothing there and looks like there never was. is there any trucks that didnt get numbers?

 

Unless it was ground off or sanded off, that is the proper location for a 1949, and YES all trucks got serial numbers.
Here is my opinion on what you have.
The frame is probably a VERY early 1948, the worker stamping the number stamped it in the wrong place and used the wrong stamp set. (Human error was not a rarity back then, and record keeping was pretty lame)
I have seen one other early 48, an F4 that was stamped there and failed to stamp the engine and model info.
It's a 3 on the tree, (remote, column shift) that was not factory available until late 1950.
You mentioned that you can't read the numbers on the rating plate, you also stated "the plate on glove box is still there and looks original because of the steel rivets holding it on" as far as I know they were NOT riveted on, every one I have seen was attached with two screws. I'd suggest you remove the plate and check the back for stamp impressions.
You have not mentioned if you checked the Patent plate (nailed to the firewall passenger side) or checked the firewall/cowl for factory coding stampings.

I don't believe that you have a 1949, nor do I believe you have a 'factory' truck. It appears that you have a truck assembled from multiple trucks.

Patent plate pass side firewall



1951 Chicago Firewall stamping



Rating plate (Glovebox)

 

When I had my cab off I did notice the number on the frame rail above the steering box was duplicated and stamped down by the rear cab mount on the top of the frame also, (two places.)