hi everybody,i have a 75 gmc 1/2 ton pickup,sierra model.stock truck,no extra accessories added on.it has been sitting for a few years.a buddy towed it to my placefor me.it has hei ignition.350 with turbo 350 trans.my problem is it's not starting.it will crank over but not start except when i run a power wire from battery to distributor,then it will fire right up.i have changed the igntion module,the ignition switch and i have traced the power wire from the distributor to the back of the fuse block and it's okay.
any help would be greatly appreciated.i hope i didn't miss anything,if i did let me know