<VV> Engine rebuild-real corvair content

[Christopher Ziebell]

I am doing a very expensive and very painstaking complete rebuild of my 
1965 monza vert.  While it has not been my goal to throw away any money 
on the project, I am not cutting any corners either.  I want this car 
done perfectly. 

Currently, the drive train is with a rebuilder who specializes in 
corvairs and who seems to come highly recommended by people on this 
list.  He has provided me with a written estimate.  I understand and 
approve of the majority of the items on the list, but am struggling with 
one line item:

Overhaul engine complete (out of car)
(Includes valve job - both heads)
(Parts not included above: pistons, valves, valve guides, cam & gear).

For this, he has quoted $620-680 for parts and $1980-2160 for labor, 
which I am not disputing.  I guess my question is, if I am rebuilding 
the entire rest of the car to brand new, should I also have him put in 
new pistons, valves, valve guides, cam, and/or gear?  My goals are to 
drive this car for pleasure on my days off and perhaps occasionally to 
other towns for car shows or just a pleasant sunday drive, and to have 
the car last another 40years or more.  Is it foolish not to replace 
whatever I can while he has it all apart?  I keep hearing stories here 
about piston heads breaking and valve guides getting dropped.  It seems 
to me these might be things that wear out and therefore should be changed.

Thanks

Chris