What Bulldog is saying is put timing light on now, as is, with advance wire disconnected. Do you see the marks line up with 8 deg?
Its very common for the distributor to be re-installed out of phase, off by one tooth. Timing is so advanced that it wont run with any more advance, but runs decent unhooked from from comp. If you have the dist in correctly and show close to 8 deg, then the ignition module may be fried. Always use a ground jumper to dist body when turning it to change timing. It loses ground when the bolt is loosened and can fry the ignition module.
When removing any distributor, there should always be 3 witness marks. One for base, 2nd for rotor position with dist still in, 3rd for final rotor position as distributor is pulled out. You need this last position on installation to get it back properly.