torque wrenches necessary 4 swap?

[89s132b]

I am starting my SR swap this week (hopefully). I have all the basic tools except a torque wrench. How important is it that I use a torque wrench for my swap? I used to work in a garage in highschool so I can kinda ballpark 100 ft/lbs. I am most concerned with flywheel, clutch. Also, assuming most of you will say it is necessary, how much should I spend and where should I get it (sears??). From looking around, they vary in price quite a bit.

thanks

[Dousan_PG]

torque wrenches are ALWAYS necessary
if you are short on cash go cheap w/ harbor frieght one
cost you 20 bucks!

http://www.harborfreight.com/