line lock 67 cuda hellllllp

Just got a hurst roll control for my 67 fb with front discs. The guy at the speed shop who made the sale told me all i have to do is connect the selinoid off the master(back side) but the instructions say to take it after the dist block, had a look see and the frickin block is way down there, would rather take it right off the master but will it work??? any input greatly appreciated...