i kept the longer y7 throttle cable on there, i was wondering if i can just adjust it to get the throttle working correctly rather than having to swap the cable out for the shorter y8 one?

How hard is it to swap out a throttle cable anyway?

 

Its really easy, take it off the intake manifold, twist off the firewall... And slide it off the pedal...pull it out from the firewall... Reverse for instalation

 

yea you can, i did it on my car you need to keep the throttle body off of the d16y7 and switch out the spring and throttle pully thing (don't know really whats it called) from the d16y8