Buick Skylark Cars

Questions

ID This V6 Engine, Please?

This (late 70s era?) v6 engine is in a non-GM vehicle I just bought and I want to do some baselining. It would be super helpful if I could pin down the details of the engine.

1991 Buick Skylark Iron Duke

I have a 1991 Buick skylark that is an incredible condition inside and out, however the motor has a cracked block. Would it be possible for me to put in a D6 instead of fixing the iron Duke? Also...

Can You Make A 1971 G-body Frame Fit A 1972 A-body Conv?

I've heard that you just need to shorten the frame by about 4", but I don't know for sure and where to cut it. Plans/diagrams would be sweet.