motor size

an aftermarket company by the name of MR. Norms managed to squeeze a 383, and later a 440 into them. the superstock factory race cars came with 426 hemi's.

Thanks, that pretty much what I thought, boy I wish Icuold get a hemi Dart even if I could afford to build a custom one, I guess I'll just have to stick to 1/25 scale models in order to get my dream Dart. :)

The factory had an m code 440 in them but the hemi superstock was s1968 only

Yes, 68' only for the Hemi.