Yes. It's the same plug that went into my 1972 chevy nova.

To the OP: The 3924 plug IS NOT THE RIGHT PLUG for a bigblock Mopar cast iron head. It will thread into either of the two head configurations but will be sticking way too far into the chamber.

It would be appropriate for most, if not all, of the aftermarket aluminum heads, and also the LA heads.

The 3/8" reach gasketed plug is correct for Poly motors and most of the bigblocks that were ever produced. Some motorhome heads used the 3/8" reach tapered seat plug, which takes a 5/8" socket, but not all of the 213 heads used this plug even though in most books the 213 head is called the motorhome head.

How confusing, right?

R.