I am Going to be replacing the Optispark/Waterpump... Should I replace the Timing Chain, its got 140k on it...

Send me a part# for which one you recommend!

 

I went with a stock replacement from oreilly auto parts. Its actually the cheapest thing i bought when doing my cam swap apart from maybe a gasket. No problems yet.

 

not too long ago i also replaced my opti and water pump. I didnt replce the timing chain though and ive got over 190k miles. But then again im planning a build for the future.

If you decide to buy a timing chain, also get the sprockets.
crank part# 10128346
and cam part# 10128349
i think those are the OE numbers