Just bought my first mopar. Looking for help!

FWIW, I’d skip looking for a 3.79 crank and proceed to a 4.0. The 3.79 is hard to find and normally ridiculous in price. 4 inch slugs are cheaper as well. Also available in Hyperutecic.

I agree if the big block route is taken. A low deck B block (383 or 400) will fit in better with more clearance than the RB (440 or 426 wedge engines) Add in a 500 stroker kit and Woooooooooo - away we go!

And if you do a big block, the easier route is to go with a B383/400 instead of the RB 413/426/440. Before deciding, go look at bigblockdart.com and look at what it involves. When it comes to A body builds, even small blocks have their own set of challenges, but your ‘73 has several advantages making it more favorable for a big block. Pound for pound, dollar for dollar, the 340 based 3.58 & 3.79 inch stroker set ups with TFS heads are hard to match.