I suppose working on your progressive edges may be a significant area to look at. 60' should be do-able, based on my personal experience behind 18 ft. boston whalers with a short ski pylon (really really crappy)
BUT, ya, you're right. it is way easier to jump the wake on true wake boats. i used to think that i was really doing something wrong 'cause i couldn't clear the wake riding any further back than 60 or 65 behind my dad's glasstron boat. i rode 75' ft behind a really nice boat and even at 75' i did not have to push it.... ANYWAY...
try some shorter cuts and force yourself to generate the same speed, (or close to the same speed) that you would normally feel just before the wake. you may still not jump the wake, but i believe that doing this a few times may help you feel out a stronger progressive edge to get more pop. then you can add more distance in your cut and clear the wake as necessary. ALSO, if you are not already jumping toe-side, i'd suggest really going for it. a lot of times i see people get more pop toeside than heelside, despite they feel less comfortable with toe side. it is a common phenomenon, even I jump better toeside riding SWITCH (which for me, switch is deffinately at a beginers level and i just recently cleared the wake... first time being toeside) for now anyway.
so for a re-cap:
1. try shorter cuts, at least temporarily to feel things out to gain a stronger progressive edge
2. put forth more effort on toeside (if not already) and something might just click that in turn will help your healside edge and pop.
3. Wait for a few other Wake worlders to give their advice, many of whom may be a bit more qualified too than myself. always good to get other suggestions of course