I've never been in this forum, but I'll take a stab at helping you. If the drallion uses a cocker valve or an 11/16" valve (the same size as a spyder, viking, newer cockers, cyborg, etc.) then the valve will fit. It also needs an IVG to hold the valve in place, which you can tap into the bottom tube if it doesn't have IVG threads. All it takes is a 3/4-16 tap. I hope that helps even though I have no clue how a drallion works.
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