backfiring.
carb or timing
You either removed the catalytic converter or you are running too rich.
your timing is off or bad camshaft.plus starving for fuel....
123 hp
This is called backfiring and can be due to a variety of causes, such as incorrect air and fuel mixture or a faulty ignition.
Roughly 112 horsepower
10w40 full synthetic.
Well, mostly the fact that its extremely heavy and not even close to being aero-dynamic.
Could be a hole or leak at one of the joints or cylinder head bolts / nuts.
it is mostly the timing off or the carburater needs adjusted.or the petrol filter requires replacing [at fuel pump]
Spark plug wires crossed, Bad distributor cap and /or rotor, Exhaust leaks close to engine, Worn camshaft/lifters, Burned valve, Also need to know if it is backfiring out the tail pipe or out the carburetor, it makes a difference.