A 78 is a 9k pickup...a Seth is around 8 and the PG is around 8 and a quater to 8 and a half...
You can not hear more power in 1k or less what you do get is a thicker midrange and maybe a little more crunch and compression...
A 9k Seth or PG will not sound like a 78 because the wind is differnet...a 9k Seth sounds like a stock Seth with a little thicker midrange and a litle more compression...same for a PG...
I tried a 78 once in a 58 reissue LP...great sound, not really the VH1 sound unless you are looking for it and even then in a LP it was a little differnet.
Compared to another 58 reissue LP with Antiquities they were similar in ways (both are an Alnico II PAF clone) but different as well...the Ant is more open and bell like where the 78 is a little more aggressive, more midrange heavy and more compressed sounding.
If you want a slightly hotter PAF the 78 is a great choice and unless you drop it in a Strat, plugged into a Plexi cranked to 10 and try you're not gonna get the VH thing...and even then unless you are trying your ass off you might still not get there!