i need help w/duster engine

Will you need to have the valve guides and seats machined to run the springs? Only way to check the clearance, now that the heads have been cut, is to install everything, and clay it.

the engine is together now...
well.....the heads arent off anyway..i have lifters in #1 piston..
no intake manifold is on it..but i put pushrods back in the #1 piston.
and did a rotation check.. 10 degrees before top center and ten degrees
after..and i pushed the valve down with the adjuster and a diag gauge on the spring retainer to see how far it would do down ..
i measured it...i can look for the numbers..
i ll have to call my dad ...to ask where the sheet is.
mel..