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l98 heads on the older engines?

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Old May 15, 2006 | 09:52 PM
  #1  
linkz761's Avatar
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From: St. Louis
Car: '86 Trans Am
Engine: stout 350
Transmission: automatic
l98 heads on the older engines?

yall have said in posts way back when thats the L98 heads (the ones from the FI engines after 86 i think) are better than the ones I have now. will those heads fit on the older 350 engines? what makes them so much better/different?
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Old May 15, 2006 | 10:12 PM
  #2  
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From: LR AR
Car: 86 IROC-Z
Engine: 385 TPI
Transmission: 700-R4
Axle/Gears: 9Bolt 345'S
yes, but if u are going 2 do the work, buy aftermarket alum. pefrm heads
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Old May 15, 2006 | 10:18 PM
  #3  
linkz761's Avatar
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From: St. Louis
Car: '86 Trans Am
Engine: stout 350
Transmission: automatic
yea

yur prolly right. I was just wondering, trying to get my facts right. when i fall into some money, if ever, which aftermarket heads should i get, judging on my set-up in my sig. are ther any other relatively cheap upgrades i can do? should i get a fuel pump to meet the heightened fuel demands of a 350 over the 305?

Last edited by linkz761; May 15, 2006 at 10:23 PM.
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Old May 16, 2006 | 07:05 AM
  #4  
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Axle/Gears: Behind me somewhere
Heads differ in their combustion chamber sizes, their port dimensions and consequently their flow potential, the thickness of the castings in various places, and many other details.

The 083 heads are among the better stock ones out there. As to how much "better" than whatever you have now, I guess that would mostly depend on exactly what you have now. If you have 70s smogger crap like 882 or 624 castings, then yes, they are SIGNIFICANTLY better than those. If you have double-humps, then they're roughly similar. "Stock" covers ALOT of ground, when it comes to 350 heads.

The stock fuel pump for a 305 will move at least 400 HP of fuel. I doubt you'll gain anything by changing it.
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Old May 16, 2006 | 10:57 AM
  #5  
linkz761's Avatar
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From: St. Louis
Car: '86 Trans Am
Engine: stout 350
Transmission: automatic
how to find out

anyone out there know where on my heads i can look to see which kind they are? or how else to id them? I gotta pull the engine anyway since itsa hunk of crap, so i could look and find out then.
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Old May 16, 2006 | 11:02 AM
  #6  
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Under the valve covers, between a couple of the rockers.

Get the number and look it up here, or post it. About 95% of all SBC heads you're likely to have will be one out of a very few numbers (maybe 10 to 12), that are all VERY familiar to those among us who deal with heads alot.
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