I would not call a SBC a junk engine. I the '60's a Mopar would generally out live the SBC and SBF engines. By the time we got to the '80's things had evened out. There is a lot of expensive street rods out there with SBC under the hood, or no hood. Now an early Hemi is cool, and the reason many got swapped in was the cool factor combined with power and reliability.