Rear Crossmember Pto Hole Sleeving

The rear crossmember of the Land Rover had a PTO hole in it. This is one of those things that make it a Land Rover. Since I am making the frame out of Rec tube and I need to know how much space i need around the hole to integrity of the tubing.

The tubing is 2x5
The hole I want to make is 4 inches. Will this make the tubing too weak if i cut the hole and weld in a sleeve?



original setup


So If i did 4 inch PTO hole like original that will leave me with 1/2 inch top and bottom of the hole.
Will this be too little? I was originally going to do a 3 inch hole but i found this piece of tubing to sleeve it with. The original hole was 4 inch OD for the Rover crossmember, but the crossmember was a bit thicker.

 

I'd go with 4" tubing, it's a crossmember so no real vertical load to stress it; I'd think 1/2' top & bottom would be fine in this circumstance, the real stress wouldn't be on the web anyhow.

H.

 

I think my only caveate to that is tow tow with it. Not like i will tow much, but i may drag a small trailer. I was planning on sinking in a receiver in the crossmember also