toss up for a motor in my 54, need your help

[ClassicDreamer]

well as the 54 chevy pickup project advances it time to make a concrete decision on a motor set-up.
The frame is a 87 s10 chassis. Currently has a s10 4.3 and 700r4 trans. Now for the options
Lt1 96 or 97 (5-1000 dollars)
ls1 swap (3-4 grand here in the NY area)
4.3 Twin Turbo (why? just like the idea of being different and love turbo) Would do a standalone wiring system.

Wiring issues on either swap?

I know many guys like the ls1 swaps.

Power? Seems from just reading that the 96-97 lt1 motors had 330hp and the ls1 motor has 350hp. Is it worth the extra money for the swap and why?

One more reliable than another?

I know ls1 is alum and the lt1 is iron block.

I am a newbie to the American car scene. Thank you in advance for any info!

Andrew