<1) use the A2 intake manifold or one from an 82' Quantom(4cyl)?
I used the A2 manifold, but it interferes with the wall on the drivers
side, I don't know anything about the Quantom manifold.

<2) what did you do when the dipstick hole is/was(since I will using the
one for the <diesel oilpan instead)?
I bent the tube slightly to get it out of the way and put a small elastic
cap over the top.  The cap that I found that worked well came from home
depot, found it in the hardware aisle.

Dave K.
1.8 Cis-e conversion