12V systems became standard on most vehicles in 1956.

I can't help on the coil question except to say if it was on a '58 engine it is probably a 12V coil.

A 6V starter will not mesh with a '58 12V flywheel.

The HEI distributor will not fit in a 235 but can be modified to fit. A search should locate the way it's done.


"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.