Lugnutz,
Just wanted to thank you for your T5 build page. Just purchased an 83 T5 for my 3804. Already replaced the 5:13 for 4:11’s. In the rear. Engine was upgraded to a 235.
Jim
Does that T-5 have the .72 overdrive? If so, you are going to be very happy with that 4.11 and the tall tires of the 3800. You will be able to pull stumps and drag them down the road at 70 MPH. 1st gear will be usable as 1st gear instead of a granny gear.