Mustang tank install help...

[legotech7]

Well, after all the research and measuring and back and forth with some folks on the net, I decided to get a mustang tank for my bag build. I had a LMC Blazer type tank under the bed, but it sat too low for my taste. It just didn't look right. So I got the tank from Tanks Inc. Nice tank except it wouldn't fit between the frame rails. where it was supposed to go. Seems that its a tad too wide at the bottom end about an inch on each side. So I would once again ask those in the know. If I cut out about an inch from each side of the bottom of the frame rail, will this hurt the strength and integrity of the frame? Will it weaken it much. I had to remove the rear brace, so I could slide the tank in. I was going to fab a tube frame to sit the tank in and bolt it down nice and neat. That would bring it up at least another inch and it wouldn't scrape the ground when I lay the truck out.

I should mention, my ride is a bagged 70 C10...

This is what I might need to cut out, where its marked. It would still leave me 2'' of the frame rail. I think it might work. I wasn't anticipating this little issue, but I need the advice of some one whose done this, before I proceed... Thanks all........