318 Poly A engine in a 67 Cuda

Have a look at this website, very good information and dispels a few myths about weight and width.
Poly 318 and A-block History and Myths - Poly318.com
Yes that was a very good read. I have done a ton of research on these but all of it has been done through written intel. I'll make a trip and pick up my poly as soon as it's above 30 again. It will be nice to put my hands and eyes on one in person.

Yup. One myth is the weight. The heads are def heavier but not hemi heavy and the block is heavier but in all the right places. I wouldn't compare it to a ritter block because I have talked to Ken and I understand the differences the R block presents in detail. But it's way more stout than an La block and it will allow me to run a torque storm without issue. Every machine shop I talked to would not commit to an La block holding 700 dependably. Or even 600.