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Old 08-24-2010, 06:26 PM   #1
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Need a new L98 long block...

My '92 L98 has developed a miss above idle. The compression on number 8 dropped to about 70lbs. I have no reason to suspect a cylinder head leak, broken piston or rings. It appears I lost a lobe on the cam... unless you have some other ideas.
What rebuilder/remanufacturer offers a VIN 8 replacement with comparable compression and roller cam specs with all the sensor provisions? I'd even consider something with more power as long as it works with my HyperChip. I don't have time (or money) to reprogram my ECM. What about warranties, core charges, shipping, etc. I figure a long block should be far less than the cost of machine work and new pistons, cam, etc. Thanks!
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Old 08-25-2010, 11:35 AM   #2
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If you think it's the cam. why not just change it?
If you don't have the money just get a replacement LB. Chevy and many others offer long blocks in many HP ratings, and specs. Just get one that has specs. close to yours.
http://sdparts.com/catalog/crate-engines
Just an example.
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Old 08-25-2010, 04:57 PM   #3
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I forgot to mention it's been faithful for 185K so it's overdue for some attention... thanks for the suggestions!
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Old 08-28-2010, 09:19 AM   #4
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I'd look for a L31 long block (Vortec 350 truck motor), but you would have to go and get a vortec base manifold. The heads flow much better and they stopped making this motor in 2002 or so. The 'newest' L98 will be almost 20 years old.
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