LS Swap Help Please

[JJAB]

I need a little help or direction on a few ls swapping techniques.

1.) 6.0 into a 1980 SWB. I have an aftermarket griffin radiator. The steam hose or vapor line running from under the bottom of the throttle body, well I do not have a place to run it to on my radiator. Can it be capped off. Help with this please.

2.) I have aftermarket automeer guages. Instead of purchasing the temp sending unit housing to screw in the head, do you guys think that I could splice inot the original temp sending unit wire(s) to feed my alternator guage?

3.) Am I correct in thinking that 1998-2002 camaro headers will fit my 1980 c-10.