my kid has a 1977 tnt everest with a 399 twin wont fire on fan side already put alot of money in it would a 340 or a 440 mount to the same clutch thats alredy on it . :whistling:

Yes it will but you should check the spark plug wire on that side first.

Yes it will but you should check the spark plug wire on that side first.[/b]
Or coil, points and condenser

Or coil, points and condenser[/b]

Sounds like good advice, as long as the compression is good of course.