[1958ford]

Cheetah was running great but now one side seems to foul plugs a lot, also, when running it appears as though the spark wire is arching to the engine. Is this a coil issue or suggestions. Thanks guys.

 

[77Scorpion]

it could be. i would start from the top and check spark plug wires then coil or if you have cdi then the stator

 

[TwinsofMLB]

Get pics of what the fouled plugs look like, that would indicate what the general cause is.

 

[RJ Gleason]

Cheetah was running great but now one side seems to foul plugs a lot, also, when running it appears as though the spark wire is arching to the engine. Is this a coil issue or suggestions. Thanks guys.

This is the problem.
Replace the wire.