I have two young kids, so $ is tight. For the next 5 years I'll keep it stock and would only consider inexpensive mods; carb, intake, headers, etc. My only concern is by modifiying it, (drop in a 440) I'll ruin the value of the car.
Okay, so for now you're looking just to get it drivable with the mods later...
Can I suggest going the cheapest route in this? Get a Factory Service Manual and read up on it.
Buy the parts and things you'll need to do it yourself. You can save a ton of money by not having to pay shop service rates. Any questions, well, hey, that's what we're here for.
It would require an investment of a few things on your part, besides the tools, but the investments aren't that expensive. A jack, jack stands, drain pans, a cheap Prestone flush kit for the heater hoses, etc. Plus parts and fluids.
Other than that I can advise you on what to expect in hours on an estimate (I own my own shop) but labor rates will vary and so will the price of parts, depending on the local shop's mark-up. As far as that goes, though, see what you can do to nail the shop down on a written estimate for: tune-up, oil change, coolant and t-stat, trans service (
done right, it's been sitting for this long) and carb rebuild. If he's not willing to give you a complete break down on what's needed, I'd walk away.
By the way, what's all included in the estimate so far?