743's were solid , simple machines , still see a few around ----the best bet on the pick up tube is hard plastic instead of the original soft tubing , the soft tube would deteriorate and the tube fall off in the tank , they use to put screens on the end of the tube , best to not as they will get stopped up and the filter catches it any ways ---- I know you already converted the filter head and filter , but there is an adaptor which converts the Lucas style filter and bowl , which was a terrible design to a screw on type ---- I think the best ones they ever built was wheeled machines 753, 763, 773 and tracked machines T190 , T250 and T300