440 jetting changes.....these plugs looking kind of lean?

[brasil]

...with that low vacuum..stay with the 4.5 PV

I have  also only 9-10 Inches of Vacuum @ idle....  and use the 4.5 PC....when I cahnge the 4.5  to a 6.5 PV... I need a lot ( and I mean a lot ! )   more gas.... 

Greetings Juergen