Your other option is a rcd gear drive with front mount dizzy setup. Jesel setup mandates use of a crank trigger and doesn't allow for much in the way of accessories. The question is, what do you have, what is it used for, and why do you want a front mount dizzy for? The conversion, regardless of which one you do is very expensive and there is no performance gain from it. Only real reason to do it is clearance issues in a tight chassis. It's not needed or worth the cost for anything other than a high end deal.