Depends on how much you get the tranny for.
Most yards want ~$500 for a used 5 speed. I got mine for $175.
Then add ~$150 in junkyard parts; crossmember, clutch pedal, bracket, starter, linkage, shifter, bezel, boot, wiring harness, and misc hardware.
I paid $250 for an Act clutch and PP, and another $100 to have flywheel lightened and balanced. But, you could just get a cheap clutch for less than $100 and $10-20 to have you flywheel surfaced.
So, if you went completely bare bones and you could find a trans for that cheap, you could do it all for less than $450. But, could run up to well over $1000.
I did the labor myself, that woul be the biggest expense.
I am doing a complete restore of mine along with the swap. I am into it for over $2K. But, I am replacing EVERYTHING while I have it appart.
The swap is done, but the project is still underway. I may pull the trans again to install a Phantom Grip LS differential. I sure wish, i would have just had some patience and installed it before I got the 5 speed in for the swap.
I am currently working on the suspension.