Yes Laurie D,I believe 1 and 2 J series bells are interchangable,can even fit a V160 with 2J bell to a 1J etc etc.Same with flywheels.All this info i have on good faith from various reliable sources.I have not tested the info myself.It is common knowledge the na 2J flywheel is the only one for W58 to 1J.
i guess its like the M series stuff being fairly interchangable ,ie flywheels and starter motors etc.Cheers.Pete.