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04-09-2007, 02:50 PM
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#1 |
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Registered User
Join Date: Feb 2006
Location: nashville
Posts: 217
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camel humps
trying to see what my heads came off of the # 3991492
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1997 pontiac grand prix gt (daily driver) for now; 2004 dodge ram quad cab (wife's truck) 4.7; 2000 pontiac booneville (wife daily driver) 1972 chevy cheyenne 350 bored 40 over 700r trans 373 gears ( posi) soon to be daily driver; 2002 gsxr750 sold 
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04-09-2007, 03:22 PM
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#2 |
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Roadtrip!
 
Join Date: Feb 2003
Location: Grand Rapids MN
Posts: 13,713
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Re: camel humps
1973 350 hi perf. Angled or old style large plug.
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67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto |
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04-09-2007, 09:38 PM
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#3 |
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GEARHEAD
Join Date: Jan 2007
Location: CENTRAL,PA
Posts: 2,284
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Re: camel humps
"492" – 3991492. They were found on 1970 to??? LT-1 engines. They had 2.02/1.60" or 1.94/1.50 valves, 64CC combustion chambers, DO have accessory holes, intake port volume should be 161CC's, exhaust port volume should be 62CC's. These heads have double hump casting marks. This particular casting head was also available as an "over the counter" head from GM in straight or angle plug configurations.
IMO they are still good heads but there's always a but. They (most) of the time require modifacations that meke the a second choice unless trying to stay original. GOOD IDEA sellem' they can bring good money for some one that is looking for the older heads to make something original. Then buy new castings or after market heads wiyh the money. Head technology has come along way over the years. I'm not saying this to say they are bad just my honest opinion. I have a set that have been heavily modified and have way more than I should in them. !1800.00$ plus+. This was a racing application head where the rules stated: Factory casting only No Vortec. They perform GR8 but money could have been better spent if rules allowed IMO. Would I ever do this on a non race application or where rules are different-NO NEVER Better can be had for less money. Hope this helps RJ22
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Last edited by RACINJASON22; 04-09-2007 at 09:42 PM. |
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