Remember the rotation of the dizzy is clockwise and you should have wires 18436572 in a clockwise manner (found that after I owned a big block for 8 years...). Manual suggests pointing dizzy toward alternator on TDC timing mark so the pot doesnt hit the firewall, but that is minor and depends on who dropped the oil pump drive in there. Belching flame is spark when an intake valve is open, check all valves as your is a solid lifter valvetrain. about half should be relaxed while the other are somewhat compressed. EZ way to figure that out is bump motor and watch valves, when the intake opens fully on any cylinder, the exhaust should be closed and "jiggle" loose. Same on the exhaust: when they just start to open, check the intake, should be closed and "jiggle" loose. Exhaust get a little more clearance than intakes. Itll run decent, safe but loud on loose rockers but not good at all on tight rockers.