Hey Denny...not a lot of traffic on this site any longer...if you're on Facebook join the group over there as well.
A few things to consider:
Flush the brake and power steering fluids
How are your tires for dry rot and date of manufacture code
If you're reusing the top end clean the EGR system well - especially the tube that runs under the intake
New thermostat
There are some rubber fuel line hoses on the back side of the intake - replace those with new fuel line
Transmission cooler lines that run from the hard line to the radiator cooling area should be replaced
Make sure when they service the transmission they follow the Isuzu shop manual for the proper refilling - it's different than most vehicles
Hope all goes well for your rebuild.
Live, Love, Forgive and Never Give Up