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09-20-2017, 12:41 PM
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#101 |
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Registered User
Join Date: Oct 2016
Location: san bernardino ca
Posts: 1,611
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Re: 283 and a Slight Hop Up
I got my 283 almost ready to drop in soon. I will get pictures today looks really nice. Imo
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09-20-2017, 04:19 PM
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#102 |
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Registered User
 
Join Date: Sep 2006
Location: San Francisco
Posts: 4,782
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Re: 283 and a Slight Hop Up
I will be rebuilding my 283 also. I thought about putting in a 350 with a 700R4 but the truck is original and since I always tell others with original trucks to keep them that way how could I not. Only switch is I now have a Muncie 3 speed with OD so I will be happy with that I hope.
__________________
"A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536 |
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09-20-2017, 04:25 PM
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#103 |
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Registered User
Join Date: Oct 2016
Location: san bernardino ca
Posts: 1,611
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Re: 283 and a Slight Hop Up
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09-20-2017, 04:26 PM
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#104 |
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Registered User
Join Date: Oct 2016
Location: san bernardino ca
Posts: 1,611
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Re: 283 and a Slight Hop Up
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09-21-2017, 05:24 AM
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#105 | |
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Senior Member
 Join Date: Sep 2016
Location: Denmark
Posts: 308
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Re: 283 and a Slight Hop Up
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09-21-2017, 07:49 AM
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#106 |
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Registered User
Join Date: May 2017
Location: Colorado
Posts: 45
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Re: 283 and a Slight Hop Up
Just curious about heads for a 283. I still have the original 283 in my truck and it has surprisingly really good compression. I've considered leaving it in and putting a different cam, intake, and carb. I've heard people using 305 heads and I was wondering if I could use a set of 1.94s I have off of a 350 on it? They have newer valve guides. I've heard old 283 heads don't handle the newer fuel that well. I don't know the casting # off hand. I also have a set of double hump 2.02 heads, but I figure they would be better on a 350. My guess is I could use them but the compression will be different??
Last edited by James903; 09-21-2017 at 07:55 AM. |
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09-21-2017, 09:11 AM
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#107 |
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But Found Her 25yrs Later!
Join Date: Oct 2010
Location: Oregon City, Oregon
Posts: 10,530
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Re: 283 and a Slight Hop Up
I think the lead that used to be in gas lubricated the valve guides. I think the new guides don't need the lead.
__________________
I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035 |
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09-21-2017, 09:57 AM
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#108 | |
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Registered User
Join Date: Jun 2011
Location: Marion, NC
Posts: 851
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Re: 283 and a Slight Hop Up
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09-21-2017, 11:15 AM
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#109 | |
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Registered User
Join Date: Oct 2016
Location: san bernardino ca
Posts: 1,611
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Re: 283 and a Slight Hop Up
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09-21-2017, 12:10 PM
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#110 | |
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Senior Member
Join Date: Sep 2016
Location: Denmark
Posts: 308
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Re: 283 and a Slight Hop Up
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The seats are hardened on the newer heads for the unleaded fuel. |
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09-21-2017, 01:48 PM
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#111 |
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Registered User
Join Date: May 2017
Location: Colorado
Posts: 45
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Re: 283 and a Slight Hop Up
Maybe I will try the 1.94s with the bigger cam. I kinda like the idea of a couple extra mounting holes on the front in the newer heads. I'm actually more curious how much better the 283 will run with some of the mods (carb,intake,cam,and different heads)
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09-21-2017, 01:54 PM
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#112 |
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Registered User
Join Date: Oct 2016
Location: san bernardino ca
Posts: 1,611
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Re: 283 and a Slight Hop Up
Its hard not to have the holes in the front of the heads.
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09-21-2017, 02:42 PM
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#113 | |
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1962 C-10
Join Date: Apr 2005
Location: Las Vegas, New Mexico
Posts: 4,978
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Re: 283 and a Slight Hop Up
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__________________
Joseph Chavez  "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4 |
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09-21-2017, 03:11 PM
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#114 | |
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Registered User
Join Date: Oct 2016
Location: san bernardino ca
Posts: 1,611
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Re: 283 and a Slight Hop Up
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09-21-2017, 03:12 PM
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#115 | |
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Registered User
Join Date: Oct 2016
Location: san bernardino ca
Posts: 1,611
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Re: 283 and a Slight Hop Up
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09-21-2017, 03:29 PM
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#116 | |
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Moderator
 
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: 283 and a Slight Hop Up
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__________________
Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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09-21-2017, 03:34 PM
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#117 | |
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Registered User
Join Date: Oct 2016
Location: san bernardino ca
Posts: 1,611
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Re: 283 and a Slight Hop Up
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09-22-2017, 12:13 AM
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#118 | ||
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60-66 Nut
 Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
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Re: 283 and a Slight Hop Up
The problem with putting later model heads from a 350 onto a 283 is that the much larger combustion chambers will kill the compression on a 283. It will drop to likely 7 or 7.5-1. This is one of the reasons that the HO305 heads are widely used when upgrading a 283. The HO305 heads have 1.84 intake valves as opposed the the 1.74 intake valves in the old Power Pak heads, plus they have aprox 58cc combustion chambers.
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