Looking at them, I do see they are a bit high...I went with the Ulitmax rail (which I had completely forgotten about)These are a bit hard to find nowadays, but this is what I got for my 181. A bit funky, use lots of blue loctite, chin weld versus cheek weld, but one can use irons just by shifting from chin to cheek weld. Got mine from Amazon years ago - no longer available - but they can still be found. Various manufacturers. UTG made mine but no longer. No permanent mods necessary.
This one is similar, but note the back-order time.
Shop Sun Optics Sport Scope Mount | Up to 15% Off 4 Star Rating on 1 Review for Sun Optics Sport Scope Mount + Free Shipping over $49.www.opticsplanet.com
Then there is this - essentially the same but in stock (and at twice the price):
Shop GG&G Ruger Mini 14 Side Scope Mount | 19% Off 4.8 Star Rating on 14 Reviews for GG&G Ruger Mini 14 Side Scope Mount Best Rated + Free Shipping over $49.www.opticsplanet.com