The 340 is the biggest POS V8 Chrysler ever made.

A built 283? Seriously? With 283ish cubes? Normally aspirated? In an ElCamino?
That would take about 1.3plus hp/cube,right?
Doable I suppose, but why.............

Back in the 60's and 70's I saw many 283/292/301's at the track tearing stuff up. One of the first engines available from the factory with 1 HP per CI. By the way, I have one in my shop for a someday project.