Here is mine. Kinda thee same deal as above. I opted for 2" tubing with 1/8 wall. I was worried about the holes where it will bolt to the body so I cut the hole 1" diameter on both ends. I then got 1" diameter x 2" round stock and drilled a 5/8 hole on a lathe and welded it in.
On top of the inside engine mount of the body I took 1/4" 5"x5" plate and shaped it to fit inside. The 2 bolt holes were the old engine mount plate is I transferred them to the plate and bolted that in.
The mount will be rubber mounted between the engine bar and engine plate on the car.
Might be over kill but I hope to be pumping some sweet HP
If you needed some pictures to clarify let me know!
Cheers,
Clow
Edit: About $25 worth of material total.