[Can anyone point me to a guide of which LS1, LS2, L92, etc, engines will handle boost best (as in durable)]

fwiw.. I've heard the LQ4/9 is a great platform for boost. Search on here there are several members boosting these engines.

[wiring for 260z v8 swap]

Read! Read all of the threads here and on other forums until you don't have to ask that question anymore.

[t-56 information needed]

Found a sort of "T56 for dummies" thread at ls1tech.com

Differences between LT1 / LS1 / Viper T56's w/ pics

 

Are All T56's Created Equal? - LS1Tech.com

[Post pics of your z's here!!]

Old:

 

'80 280zx - Sold

 

New:

 

'74 260Z - Single SU draw through turbo

[Should I? or shouldn't I?]

I like it! Personally I would put it on for a while and see if it grows on me or drives any different. I'm a Porsche guy so I'm partial to the whale tails though.

Where did friend get it/ where could I get one of these? I was originally looking at the ZCC spoilers for my 260 but I like the looks of yours. I think it might go even better with a wide body rear.

 

Other whale tails:

From this thread:

 

And a zx on this thread: