IMHO, the best thing to do with an Indust. 413 it ditch all of the guts and add a stroker crank to make a 426 wedge engine out of it. way cheaper than a real 426 wedge or max wedge engine now days.

and I do think it is all over the counter parts readily available today. that block is the [censored] for a cloning 426 max wedges.

0.02 $