Without being funny, tried different HT leads in different orders, are you sure you are capable ?
It's only ever going to respond to the 1 correct firing order, which is very easy to determine, line up crank at TDC, take dizzy cap off, then start at 1st lead/cylinder, order is 1/3/4/2, dizzy runs counter clockwise(99% sure)(check), no1 cyl nearest water pump.
I'm not 100% familiar with the cvh, but can the dizzy go in 180 out, in the end of the cam ?, that could be worth checking if it can, ie it's not keyed to one way or another, easy thing to do as well, done it plenty of times myself ha ha!!
tabetha