I can’t get my 340 to start, E575BAW, bought with snapped cam belt, refurbed the head, fitted it all back, fired up almost instantly, wouldn’t idle, went away to get coolant, drive it to a garage to get fuel. Then it wouldn't start. Doesn’t sound like it wants to, just backfires and spits through the carb, double triple checked the timing, put it 180 out to see if it was, double checked the leads, getting fuel, I’m stumped and stuck in a garage forecourt in Sussex any help much appreciated

Have you got anywhere with this as yet?