sell it an buy a chevy
or like the old saying goes... its a quart low on water in the intake.
you can try this first an all these know it alls will say dont do it, but it works.
remove top of air cleaner, start engine then hold throttle from carb or throttle body at about 3500 rpm or more but not wound tight.
very very slowly poor water into intake just enough to bog engine but not stall it.
this instantly removes all carbon buildup from combustion chamber, valves,plugs, etc. also can help with cheap gas ping.
ps: on injected engines, the overly oxygenated exhaust will cause o2 sensor to enrichen engine for a short time ensuring no burnt valves. on carbs just poor a capfull of marvel oil down intake after to coat valves.