Big Block Swap

If you have the exhaust manifolds on your 383 auto combo that would work you could get your swap done at a reasonable cost. A few non factory big block a body ones that would work. When you take the k frame out to modify it install the larger torsion bars. Do not rush the job. As that could get frustrating. Not many 1976 a body's with 383s. With the torsion bars even small block is tight in that area. Regardless of engine exhaust is a cost hurdle for us Mopar guys.
The guys that have it made are the ones with strong preference of one engine over the other. I debated pros and cons of 6.4, small block and big block. I decided to go from 340 to 451. Good luck. Alot of info on this site.