It certainly isn't ideal, but yes, you can do that. However, I'd recommend against doing any drag launches on a prepared track with sticky tires. The additional leverage of the blocks can produce wheel hop in high traction situations without additional front segment support.
Another option would be to pick up some standard MP XHD leafs for a couple hundred and sell the +1.5 Espos to someone wanting a lift. Or for that matter, a set of -1 Espos would also be functional.
