273 302 318 340 build

I just noticed the shitty/fuzzy pics. Pistons are forged TRW 2332P .030Con rods are 3418645. Not sure if they are NORMALLY weighed with small end bushings or not??
Are these the beefier rods? Ive read different/conflicting statements. Also how can you tell the difference in the rod, (press fit vs floater)? ID of small end(with bushing) is 0.981" and OD of pin is 0.984". The pistons came with locks, plus they have grooves for them, so I assume floaters?
Oh recommendations for rear main seal?? Ive seen prices vary from $7 to $40... preferences?
Just doing some reading/research and getting confused.
Measured piston height(center of bore to top of piston) 1.851"
Measured eyebrows on pistons and come up with 8cc
Thanks in advance

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