If Clemenza had survived into GFII, do you think he would have turned traitor against the Family, after being loyal to Don Vito for so many years?

If im not mistaken..

The original screenplay which had clamenza written in the modern Part 2 story, saw the betrayal of michael by clamenza. This was most likely replaced by fredo's storyline of betrayal,since castellanno was not hired due to his huge financial demands.

Does anyone have that screenplay?

How did Clemenza died. They (frede en frank pentangeli) say he died of a heart attack but than Willi Cicci said: No it was no heart attack.
what does he mean by that?

He was implying that he was set up by some one and whacked

Maybe the Rosato brothers or another NY family looking for more territory.