Job Change during I-140

[ramoji35]

I am working as a engineer thru COMPANY A for about 5.5 yrs (1 yr OPT + 4.5 yrs H1B). I have about 1.5yrs left for my H1B.I have filed my PERM (Approved) and I-140 (Applied and waiting for response almost 3months completed) thru COMPANY A.

Company B wants to Hire me Full Time. (I worked at Company B all these 5.5 yrs).

If I accept the offer from Company B and do I need to start PERM and I-140 Process all over again??

Would I lose the priority date as well (28 Dec 2010 is my priority date)??

If I were to change the employers would I wait till I-140 is approved , get an extension on my H1B and then shift to Company B and apply for my H1B transfer . Can I do that with the approved I-140 from my previous Employer??

Please advice.

Regards,

Ramoji Ravuri