Alot of the parts store around here will rent tools.
But if that's not an option for ya, and you don't know someone to borrow one from, it would be a good idea to have one.
Some nuts and bolts are 'good enough' to be tightened by feel, but when gaskets and easily stripped bolt holes are in the equation, use a torque wrench. You'll be glad ya did when ya don't see oil leaking !!
AKA: Tim & 'The Adventure Cycle' VROC #24567, NEVROC, SteelCity VROC
"When life throws you curves,
Aim for the apex."