341 hemi in 1970 dart

If you weren't so far away, I have a 392 and/or a 331 I would sell you.

I put a 392 hemi into my '68 Barracuda when I was 16. It worked well except for the left rear exhaust was very compromised by the location of the steering shaft. A smaller hemi like a 354 or Dodge 315 hemi would fit a lot better. I pulled the motor out 20 years later and put it into a '56 Plymouth instead.

I will be putting a 331 hemi stroked to 378 in my '70 Satellite with aluminum heads to lighten it up. The last picture is the current state of my 392.

Nope. 331 354 and 392 are the same size except the 392 deck is an inch taller. They make deck adapters if you want to change your 354 to a 392.
I'm thinking about pulling my 354 and selling it also. My steering combination in my opinion is dangerous. I'm trying to find what others have done for steering but no luck yet, and yes they are heavy but thats with all the stock parts on it. i have mine down to about the weight of a 440. Anybody out there that has done this, I'm open to suggestions on the steering . You can PM me