When I want to shut off the engine it seen like it want to keep turning 1955 Chevy belair 235 engine

215.5 cu in (3.5 L) "Thriftmaster" 1-bbl. valve-in-head 92 hp I6[1]
235.5 cu in (3.9 L) Blue Flame I6 Production 1937-1963 US
-1964 Brazil Layout Displacement 216 cu in (3.5 L)
235 cu in (3.9 L)
261 cu in (4.3 L) Cylinder bore 3.5 in (88.9 mm)
3.5625 in (90.5 mm)
3.75 in (95.25 mm) Piston stroke 3.75 in (95.25 mm)
3.9375 in (100 mm) Valvetrain OHV, 2 valves per cylinder Compression ratio 6.5:1
6.6:1 Combustion Cooling system Water-cooled Output Power output 85 hp (63 kW)
90 hp (67 kW)
92 hp (69 kW)
123 hp (92 kW)
136 hp (101 kW)
150 hp (112 kW)

235 cubic inch straight six and 265 cubic inch v8 .

make sure pins are in good shape not sloppy but tight --then will need to loosen bolts and move door in out and back and forth till lines and gap are lined up you may also need to add or remove shims

Don't have my books handy, but I think that is a code for a factory replacement engine.

Points should be gapped at around .015

I would replace the condenser first, that's the small metal can that is connected to the points and make sure that the contacts in the distributor & points aren't burnt up and that the rotor is still good. These can all be touched up with emery cloth if they are carbon fouled. Good Luck, I hope that helps.

The firing order is 18436572.

See if this helps: http://www.angelfire.com/fl4/pontiacdude428/tranny.html
If it does not, keep it for reference anyhow, you may need it later!

Rebuild the carburetor,

first remove the fuse ,and then the wiring ,the cig lighter itself should be in two pieces and threaded together.