Need some advice 318 POLY vs 318 LA

They aren't that much heavier than an LA. About 50 lbs. I weighed mine when I removed it earlier in the year for the stroker rebuild - it was 590 lbs with the starter and exhaust manifolds.
I put a 3.58" crank in it and it's now 354 cu in.
Lovely engine, sounds great.
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Just beautiful!