OH also.. there's only a 100 lbs weight gain on an iron on iron motor.
what are your plans for radiator, clearing the dizzy..
who is making your conversion kit for the motor mounts? with a JTR (jags that run) kit you can .. well research it and you'll know =-)
stock Z radiator typically is not recommended for keeping during the swap due to the V8 flowing much more fluid and having a higher heat then the 6cyl you removed, a good dual core meant for a 80's camaro can handle this and are avail for under 200 bucks at napa summit etc..
electric cooling fans, i would recommend stealing from a jeep (high volume single fan) or the typical dual coolin fans from a taurus.
now this i sjust from my experiences and research, if you have not yet I would encourage you to check out
WWW.hybridz.org
BUT BE WARNED
they are not as friendly as this forum... ive been banned before.... =-)