did i buy wrong ignition coil

[Dats Right]

69' 521 with j15, a little while back while ordering a bunch of parts from rockauto i purchased a standard(803) ignition coil that says " use with external resistor", from reading through old threads ive found, that the external resistor is necessary when using a points distributor which i am,

the current ignition coil does seem to work fine, but looks pretty weathered so i figured i throw a new one in. The coil on the truck does not have an external resistor. so here i am with the wrong coil, should i put it in and add a resistor, or buy one one that does not call for one, or just leave the old one in, and is "standard" a decent product? Thanks 

 

[ggzilla]

You have a non-original coil now. Adding the resistor and the coil will restore it to original specification.

[Dats Right]

alright thanks that good news, ill pick up a resistor

[ggzilla]

Ensure it is wired correctly. There are three wires.

[banzai510(hainz)]

I noticed on the J motor 520/521s there was no resisitor. In dought put the orginal back in. They usuallly dont go bad.

 

the 520 i worlked on had no resistor and no hot start wire.  previos owner put a MSD Blaster in there and I put a 510 coil and a ballast in there in series and it seem to work fine.

 

but if your points burn up fast then youll know

 

 

dont be changing shit just to change it

[ggzilla]

If it ain't broke, don't fix it.

[Dats Right]

alright, yeah i got carried away ordering parts on rockauto when i saw how much cheaper they were than what my parts store was chargin me, seeing as the engine is a swap, wasnt sure what proper way  to set it up was, the coil in there has the main spark wire, and two small gauge, thought 521 usually had resistor but i dont see a mounting spot for it. but yeah it does work now, recently replaced points, condenser, rotor, dizz cap, and helped a lot, thought couldnt hurt to change coil but i guess if it aint broke.......