I already estimated how much it would be to build a long block if the parts meet specs.
http://supramania.com/forums/showthread.php?t=8475
Just to rebuild the head assuming that meets specs and is not twisted...well let me give you some background info first.
Guides don't seem to wear out much on these cars. The guides will most likelly not need to be replaced.
.0039" is the max your head can be warped before you need to straighten it out.
Being that we have over head cams that are so far from the oil pump, the cams will be somewhat scored on some of their jounals. If the oil clearances are excessive, many shops will machine some material off of the cam caps to reduce excessive tolerances. Some shops will even tell you that you can do it yourself with sand paper--but you need to be careful and keep measuring as well as know how to measure.
The services that will most likely be needed are milling (to a low RA if using a MHG), replacing valve seals, cam seals, and a valve job.
$200 valve job--with me assembling the head; add $80 if the shop builds the head
$60 mill the head
$35 clean & dye test the block for possible crack
$24 tax from machine shop
$75 valve seals--if not bought in the complete gasket kit
$10 camshaft seals--if not bought in the complete gasket kit
$7 shipping on seals
$30 *probably the cost for me to get valve shims from a machine shop*
$5 assembly lube if to be stored for a period of time; $1.70 motor oil if to be assembled back in the car soon
$446 Total cost of rebuilding a head that does not need to be straightened or to have its guides changed--
Starting from scratch
Add $50 for a valve spring compressor and its shipping if doing the work yourself and need one.
Add $280 if the guides do need to be replaced, plus tax.
Some might say that buying a built head would be cheaper from a company, but that is really an unknown to me. Some builders paint inside the head and are very sloppy and will spray where paint is not supposed to be. (That is a marketing tactic I am not too fond of--it sure makes it look nice in pictures though for some buyers.) Also keep in mind that not all rebuilders are equally concerned with the specs stated in the TSRM. What flies out of the door from one builder may be considered a defective item by another machinist/builder.