Certification is not as rigorous, if done at all, because the error will not be large in relationship to the dollar charge. "Close enough". Quarry scales are more critical, because they pack the trucks to the limit, and overwieght errors that lead to tickets kill their customers, many of whom are one truck owner/operators. Anal retentive govt. might require it, but they are not that stupid here, yet. I can see it on the Left Coast.

I agree on the v6 heft surprising me, too. A 2.6 is fairly hefty itself, with all the b/s casting, and being an old diesel block, to boot. I've move 350 blocks, and 2.6 blocks, by hand, and the 350 (133% big brother of the 4.3) is not all THAT heavier than the 2.6. I can lift a 2.6 block by hand (and bust a gut doing it), and can almoooost lift a 350. Maybe 75lbs different?. Not 800 or so, for sure. I never took the Charles Atlas course....