It could be anywhere from $500.00 to $1,500 if all parts fit and extra machine work is not needed and if parts are compatable. Those are some big ifs. If you were near me, I would give you a flat rate of $1,000 plus mark up on any parts and plus any extra machine work. That price does include any stroker clearancing needed, on block pistons and rods. but is not including any parts I.E. Small Base circle cam bearings, plugs, freeze plugs, main or rod bearings, timing sets, cam, rings etc. It does include fitting rings with a Ring Machine. It does include all labor to get any clearances where they should be.
You might be able to find someone to assemble (throw together) the parts you have if all prior machine work has been completed for $500. I can't see anyone charging less.
Ed