Ok I will go with new pistons. One of my bores has a rubbed line marked on it so to get rid of that line, I need to bore the engine out to 4.35" or bigger

I'm not too keen to zero deck the block right now. When the piston is at TDC, the clearance between the top of the piston and the top of the block is only 0.2mm (0.0078")

I would like to leave that as it is, in case this block has to get decked in the future due to some incident like warping due to over heating or something.

So I have searched for hours online, and come up with these ICON Premium Forged Pistons IC779-100 -

Are these an acceptable brand and type of piston for my build ?

cylinder volume 973.66 (with the new bigger bore size)
chamber vol 115
dome vol 18
gasket vol 10.5 (Fel-pro 1017-1)
ring land vol 1.1 (from my existing piston)
clearance vol 1.8 (keeping the 0.2mm deck clearance)

Compression ratio 9.82:1

If this is all good, I can finally go ahead and order the parts. Will take several weeks to get to me