Poly Engine what was good/bad about it and why is the LA better?

If You saw Christine in the theater, the engine displacement callouts were there, 350. I hadn't heard of one before that, I was thinking "what's this 350 bullshit!?", went to the trusty encyclopedias & Damn!! 1st-year-1-year-only-sho-nuff 350ci Dual-Fury option B engine.
Damn, i watched that movie closely looking for details. Where were the 350 callouts located ??