At 180,000 miles, the crank has had it.
2nd gen crank (why put in a 1st gen?): ~$680
New bearings ~$150
Oil Pump ~$130
Water Pump ~$90
Timing Belt ~$90
Timing Belt Tensioner ~$40
Timing Belt Idler Pulley ~$30
Engine Gasket set ~$300
Piston rings ~150
Total of $1,660 just to replace all the worn out parts. That is a lot of money. Plus with that kind of mileage, the block could use to be bored out and have bigger pistons put in. The heads also probably need a valve job. Now your up to well over $2,000. If you do the work yourself, it may be worth it, if you pay someone, forget about it.
By longblock you mean just the block and heads right? If you include all the accessories including turbos, add about $400 to the price.
A motor with that kind of mileage needs to be retired, not rebuilt.