L98 Heads

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Nov 22, 2003 | 12:03 PM

mdhoward@family

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Joined: Oct 2002

Posts: 16

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L98 Heads

How do I tell whether or not I have L98 heads on a remaufactured engine?

Nov 22, 2003 | 04:00 PM

8Mike9

Supreme Member

Joined: Jul 1999

Posts: 5,183

Likes: 42

From: Oakdale, Ca

Car: 89 IrocZ

Engine: L98-ish

Transmission: 700R4

Casting number will end in "083"

Nov 22, 2003 | 06:49 PM

NastyL98_T/A

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Joined: Mar 2003

Posts: 1,301

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From: Severn, MD.

Car: '88 T/A and '90 T/A

Engine: LB9/383

Transmission: T5/700R4

083's came on the later L98 heads and are the better heads to have. There were other #'s as well (that I can't recall) that aren't worth wasting your time if you're looking for performance.

Nov 22, 2003 | 07:23 PM

Rippin92RS

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Joined: Jun 2003

Posts: 181

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From: NC

Car: 1992 Camaro RS

Engine: 305 TBI

Transmission: GM T56

Wasn't 416 another number?

Nov 24, 2003 | 09:11 PM

smithtc

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Joined: Nov 2000

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From: Alabama

416 is the casting number for the (perimiter bolt valve cover) "better" 305 heads. 083s came on the L98 350s in firebirds and camaros.

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