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01-28-2004, 08:18 PM
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#1 |
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Registered User
Join Date: Jan 2004
Location: South Carolina
Posts: 207
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Heads
I was looking at my truck and was informed that the motor, which is a 283 and I know is not the original, has "Power Pac" heads. Can anybody tell me if there is anything special about them. Just wondering? Thanks ahead of time.
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01-28-2004, 09:43 PM
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#2 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Bigger valves-better flow-higher comp.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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01-28-2004, 09:56 PM
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#3 |
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Registered User
Join Date: Jan 2004
Location: South Carolina
Posts: 207
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So are they worth keeping?
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01-28-2004, 10:05 PM
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#4 |
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Formerly yellow72custom
Join Date: May 2001
Location: Austin, TX
Posts: 7,531
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If they need a rebuild, i would proably just put a pair of later-model 305 HO heads on it (great match for a 283) and save some money, but if they are on there i wouldn't bother removing them. The biggest problem would be if they are virgin heads, or were rebuilt awhile ago is that they would lack hardended valve seats for use with unleaded fuel
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'72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg |
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01-28-2004, 10:05 PM
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#5 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Ok to use on small bore blocks such as 265 &283. If used on large bore (327-350) comp. will be to high. Also no acc. bolt holes in heads for late model stuff.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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01-28-2004, 10:34 PM
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#6 |
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Senior Member
Join Date: Dec 2001
Location: Redding,CA...USA
Posts: 4,736
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there seems to be some disagreement onwhich heads are "power packs" I believe the real ones are #997...most people say the #520s are power packs...but I dont believe so
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It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA |
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01-28-2004, 11:12 PM
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#7 |
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Account Suspended
Join Date: Dec 2003
Location: Texas
Posts: 2,686
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Yeah if they havent been rebuilt they wont have the induction hardned seats
Be better off getting a pair of 416's |
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