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12-12-2011, 06:00 AM
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#1 |
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Registered User
Join Date: Sep 2011
Location: Stockholm
Posts: 263
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would these heads fit on a 305?
Hi guyīs.
Would GM 14101128 heads(from a corvette) fit on a 305? I found a set dirt cheap, and started toying with the idea to replace the smog tops on the 305 in my truck. Have heard that they should give decent low end tourqe on 350īs.
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Tom.______________________________________ The fleet: 2007 BMW 530xi M (daily driver) 1986 C-10 Stepside (project "my time") 1992 Corvette cab (summer time daily driver) 1969 Cadilac DeVille Cab ("it just need some paint") |
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12-12-2011, 09:49 AM
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#2 |
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Registered User
Join Date: May 2011
Location: Bradford, PA
Posts: 395
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Re: would these heads fit on a 305?
Should fit, 350's and 305's share the same block iirc. I know of people who run 305 heads on 350s.
Good luck.
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1981
 K10 Scottsdale305 ci | TH350 | NP208 | 60k miles |
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12-12-2011, 09:56 AM
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#3 |
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Registered User
Join Date: Sep 2011
Location: Stockholm
Posts: 263
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Re: would these heads fit on a 305?
Thanks sethv.
Im a bit conserned about valve clearence, intake on these heads are 2,02" Im afraid that they might catch on the cylinder wall. I know that 1,94" will clear, just not sure about going bigger.
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Tom.______________________________________ The fleet: 2007 BMW 530xi M (daily driver) 1986 C-10 Stepside (project "my time") 1992 Corvette cab (summer time daily driver) 1969 Cadilac DeVille Cab ("it just need some paint") |
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12-12-2011, 10:26 AM
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#4 |
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Registered User
Join Date: Jan 2011
Location: springdale arkansas
Posts: 41
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Re: would these heads fit on a 305?
you wont have any problems, they will clear the cyl
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12-12-2011, 10:36 AM
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#5 |
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Registered User
 
Join Date: Jul 2010
Location: memphis
Posts: 2,537
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Re: would these heads fit on a 305?
you will look some compresion ratio going from a 58cc head to a 64 cc head & on a 305, it needs to keep every advantage it has..
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1981 C-10 (Pop's) 1978 Camaro 2006 Lacrosse |
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12-12-2011, 10:41 AM
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#6 |
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Registered User
Join Date: Sep 2011
Location: Stockholm
Posts: 263
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Re: would these heads fit on a 305?
Im pretty sure that L98 heads are 58cc, but I might be wrong.
__________________
Tom.______________________________________ The fleet: 2007 BMW 530xi M (daily driver) 1986 C-10 Stepside (project "my time") 1992 Corvette cab (summer time daily driver) 1969 Cadilac DeVille Cab ("it just need some paint") |
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12-12-2011, 11:07 AM
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#7 |
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Registered User
Join Date: Apr 2011
Location: corpus christi, tx - america's fattest city
Posts: 253
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Re: would these heads fit on a 305?
Not sure I'd do this unless the 305 gets an overhaul first. Any time you break a seal on the long block assembly it's best to go through everything. That's been my experience. Think of it as a yin/yang philosophy, any time you add something new you take away something else.
I'm getting a Goodwrench 350 4-bolt crate and scrapping the 305, it hasn't been run in at least 10 years and not sure how well after sitting that long. To me it's not worth rebuilding or keeping esp. when a new crate is actually cheaper than rebuilding an older engine. |
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12-12-2011, 12:12 PM
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#8 |
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Registered User
Join Date: Sep 2011
Location: Stockholm
Posts: 263
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Re: would these heads fit on a 305?
The deal was to good to pass up, the heads are brand new still in their GM boxes. got them for 300$ (at least in my part of the woods thatīs a good deal) So if I donīt use them in the truck they can sit on the shelf until I find something to put them in.
I might swap for an LS later if I can find a good one here, or trade the truck for a 68 Firebird cab that I have my eyes on:-)
__________________
Tom.______________________________________ The fleet: 2007 BMW 530xi M (daily driver) 1986 C-10 Stepside (project "my time") 1992 Corvette cab (summer time daily driver) 1969 Cadilac DeVille Cab ("it just need some paint") |
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12-12-2011, 12:17 PM
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#9 |
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Registered User
Join Date: Dec 2010
Location: sioux city, iowa
Posts: 619
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Re: would these heads fit on a 305?
Go for it. If not sure call a machine shop. I don't agree with "Any time you break a seal on the long block assembly it's best to go through everything.
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12-12-2011, 02:14 PM
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#10 |
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Registered User
Join Date: Dec 2008
Location: Over yonder
Posts: 259
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Re: would these heads fit on a 305?
Here's a link to some heads that have been flowed as well as from some other sources.
http://www.thirdgen.org/techboard/tb...-headflow.html |
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12-12-2011, 03:19 PM
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#11 |
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Registered User
Join Date: Apr 2011
Location: corpus christi, tx - america's fattest city
Posts: 253
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Re: would these heads fit on a 305?
It's up to you, of course. Just sharing my experience with engines. Any time I've done a new top end the rings failed.
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12-13-2011, 03:19 PM
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#12 | |
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Registered User
Join Date: Oct 2010
Location: Largo Florida
Posts: 632
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Re: would these heads fit on a 305?
Quote:
__________________
Lifes journey is not to arrive at the gate well preserved, it is to slide in sideways all used up and wore out yelling.....God what'a ride! Where patience fails, force prevails Stapp's Ironical Paradox "The universal aptitude for ineptitude makes any human accomplishment an incredible miracle." |
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12-13-2011, 04:13 PM
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#13 |
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Registered User
Join Date: Sep 2010
Location: Kirkland, WA
Posts: 241
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Re: would these heads fit on a 305?
Even if the valves clear the cylinder wall without touching, you're going to encounter severe shrouding issues. Combined with the drop in compression you're going to kill your power, not increase it. I say definitely do not put those heads on a 305. You're going to do much more harm than good.
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