replacement block for 525SC
#11
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Joined: Jan 2006
Posts: 3,865
Likes: 793
From: St. Pete Beach, FL
Are you building the engine up yourself? Or you want to buy a new Long block?
#13
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Joined: Oct 2013
Posts: 2,888
Likes: 148
From: SF Bay Area
I’d like to hear opinions about the ZZ502 shortblock for marine use, but that with a cam swap and some heads from ADK61 should be a stout and reliable package. Probably into it $10k at that point though.
#14
well as you can see...the valvetrain is the weak link in a big block so I would spend the money there for reliability for sure...quality roller cam, lifters, and rockers....and a side effect of that reliability is power so its a win win lol
#15
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Joined: Jan 2018
Posts: 93
Likes: 9
From: PA
Isn't this a suitable replacement block for the power he wants?
https://www.gmperformancemotor.com/parts/19170540.html
https://www.gmperformancemotor.com/parts/19170540.html




