Sir; i have have a 71 hq holden that we have put a vk holden carby engine that has been going well, now my trouble is, after an engine freshen up and cam change [crow cam part no.35626,mechanical/solid type profile] the thing won't start. it turns over ok, tapet adjustments ok, fuel ok,carbys ok cam and crank timeing marks set right [dot to dot] but i feel its somthing to do with the ignition timeing. i've been setting no/1 cylinder on t.d.s and dropping in the dissy also set at no/1 spark plug yet it's a no go; i believe it is to do with the way im maybe setting the crank timeing marks wrong nothing else has changed, and nothing is hitting or binding.[more cam detiles; inlet opens....32 b.t.d.c closes....66 dur...278. exhaust opens....72 b.b.d.c b.b.d.s closes....30 dur....282. inlet lobe lift at t.d.c on overlap .085; what am i doing wrong please...hal