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12-16-2012, 02:44 PM
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#1 |
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Registered User
Join Date: Feb 2012
Location: Albuquerque NM
Posts: 3,053
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383 or Big Block it?
Hey guys n gals, i'm at a point where I need to decide if i keep the built 383 or put in a Big Block...the 383 (solid lifters)I have really isn't practical for daily driving and I am sure I am gonna drive this thing daily and park the 06 Cummins or sell it to buy a 4x4 cheyenne...... The 383 is built to 500 HP and really dont need all that power.
Eagle crank and H Beam Rods Comp cams 280 duration .55 lift GMPP vortec Fast Burn aluminumn Heads roller rocker studded and girddled Holly 750 GMPP vortec intake Probe Pistons 383 Stroker  
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SOLD -77 CHEYENNE SWB, LS SWAPPED -1976 SILVERADO YUBA GOLD/NEUTRAL (2-TONE) Last edited by HotRod C/10; 12-16-2012 at 03:16 PM. |
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12-16-2012, 03:54 PM
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#2 |
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Registered User
Join Date: Jul 2011
Location: oklahoma city
Posts: 692
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Re: 383 or Big Block it?
I would think you'd get better gas mileage for a DD with the 383. Have you considered changing out the cam and carb to lower the hp?
Looks like your 383 is a fresh build, so I'm sure you could sale it and get a nice jump on building a BB. But otherwise would be cheaper.
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Daniel 68 C10 Build http://67-72chevytrucks.com/vboard/s...d.php?t=503594 Romans 10:13 Everyone who calls on the name of the Lord will be saved. |
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12-16-2012, 04:09 PM
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#3 | |
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Registered User
Join Date: Jan 2011
Location: Townsend MT
Posts: 1,725
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Re: 383 or Big Block it?
I'd run a big block. I had a 383 and couldn't ever get better than 11 MPG with an overdrive.
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1966 F250 4X4 416 1972 K20 350 4 OTF Quote:
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12-16-2012, 04:17 PM
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#4 |
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Registered User
Join Date: Feb 2012
Location: Albuquerque NM
Posts: 3,053
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Re: 383 or Big Block it?
If I can recover some of my investment in the 383 I will go Big Block.
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SOLD -77 CHEYENNE SWB, LS SWAPPED -1976 SILVERADO YUBA GOLD/NEUTRAL (2-TONE) |
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12-16-2012, 04:19 PM
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#5 |
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Registered User
Join Date: Jun 2008
Location: South Florida
Posts: 11,375
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Re: 383 or Big Block it?
If you are going to drive it daily I would sell eveything and install an ls3...
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Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild |
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12-16-2012, 04:20 PM
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#6 | |
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Registered User
Join Date: Feb 2012
Location: Albuquerque NM
Posts: 3,053
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Re: 383 or Big Block it?
Quote:
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SOLD -77 CHEYENNE SWB, LS SWAPPED -1976 SILVERADO YUBA GOLD/NEUTRAL (2-TONE) |
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12-16-2012, 04:30 PM
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#7 |
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Registered User
Join Date: Nov 2008
Location: Anchorage Alaska
Posts: 412
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Re: 383 or Big Block it?
crate 454..(or a 509 merlin)
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12-16-2012, 04:37 PM
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#8 |
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Senior Member
Join Date: Apr 2004
Location: sw colorado
Posts: 2,720
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Re: 383 or Big Block it?
I have a nice little factory bore early 90's 454 short block that would make a nice start...
i am a big block guy, so i say go BBC. i've never had a disappointing BBC. |
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12-16-2012, 06:18 PM
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#9 | |
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Registered User
 
Join Date: Dec 2006
Location: Toms River, NJ
Posts: 5,518
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Re: 383 or Big Block it?
Quote:
Posted via Mobile Device
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Keith 66 Suburban Burb Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=751361 IG: bennett68c10 |
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12-16-2012, 06:22 PM
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#10 |
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Registered User
Join Date: Nov 2010
Location: Grand Terrace, Ca.
Posts: 1,607
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Re: 383 or Big Block it?
Once you go big block you never go back. I vote big block.
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12-16-2012, 08:57 PM
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#11 |
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My Carbon Footprint
Join Date: Oct 2008
Location: Orygun
Posts: 5,527
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Re: 383 or Big Block it?
As hard as it may be to swallow, I'd consider selling the motor off in parts. Many guys are afraid of buying complete motors these days and you usually take a bath. Especially if they can't see inside. I'd sell the short block by itself, then the heads, intake/carb. I'd even pull the valvetrain and sell it by itself. I just pieced out my roller valvetrain about a week ago and actually got more money for it than what I paid!! You are lucky to get even half of what you paid for a complete motor. You can usually do much better selling in sections.
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12-16-2012, 09:33 PM
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#12 |
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Registered User
Join Date: Aug 2012
Location: Council Bluffs, Iowa
Posts: 280
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Re: 383 or Big Block it?
Who builds a truck for good gas mileage anyway? Put a motor you can beat on that is also something you can rely on.
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12-16-2012, 09:37 PM
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#13 | |
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Registered User
Join Date: Feb 2012
Location: Albuquerque NM
Posts: 3,053
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Re: 383 or Big Block it?
Quote:
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SOLD -77 CHEYENNE SWB, LS SWAPPED -1976 SILVERADO YUBA GOLD/NEUTRAL (2-TONE) |
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12-16-2012, 09:40 PM
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#14 | |
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Senior Member
Join Date: Apr 2004
Location: sw colorado
Posts: 2,720
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Re: 383 or Big Block it?
Quote:
that why i have a 454 for sale 
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12-16-2012, 09:42 PM
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#15 |
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Registered User
Join Date: Feb 2012
Location: Albuquerque NM
Posts: 3,053
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Re: 383 or Big Block it?
what you looking to get for it? any pics details?
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SOLD -77 CHEYENNE SWB, LS SWAPPED -1976 SILVERADO YUBA GOLD/NEUTRAL (2-TONE) |
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12-16-2012, 10:00 PM
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#16 | ||
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Registered User
Join Date: Jan 2011
Location: Townsend MT
Posts: 1,725
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Re: 383 or Big Block it?
Quote:
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1966 F250 4X4 416 1972 K20 350 4 OTF Quote:
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12-16-2012, 10:14 PM
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#17 | |
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Senior Member
Join Date: Apr 2004
Location: sw colorado
Posts: 2,720
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Re: 383 or Big Block it?
Quote:
 its a 90s 2 bolt one piece rear main. has speedpro hypereutectics that are 9.5:1 w/110cc head. should be a decent pump gas motor with a 118cc head. if you are interested feel free to PM me, i am not sure what the rules are for selling outside the parts board and i dont want to step on toes! Ryan |
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12-16-2012, 10:23 PM
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#18 |
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Senior Member
Join Date: Apr 2004
Location: sw colorado
Posts: 2,720
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Re: 383 or Big Block it?
i wish you still had those 71-2 buckets... that would be excellent trade material!
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12-16-2012, 10:25 PM
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#19 | |
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Registered User
Join Date: Feb 2012
Location: Albuquerque NM
Posts: 3,053
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Re: 383 or Big Block it?
Quote:
__________________
SOLD -77 CHEYENNE SWB, LS SWAPPED -1976 SILVERADO YUBA GOLD/NEUTRAL (2-TONE) |
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12-16-2012, 11:24 PM
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#20 |
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Registered User
Join Date: Feb 2004
Location: Stokesdale, North Carolina
Posts: 341
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Re: 383 or Big Block it?
I vote BBC, but I'm partial.
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1967 SwB, 454 BB, 4L80E trans, 3.73 eaton posi 1997 C2500 Ext Cab 5.7 Liter 1955 3/4 ton 1st series w/ 235 straight six Sold it 
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12-17-2012, 12:25 AM
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#21 |
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Registered User
Join Date: Dec 2012
Location: Chandler AZ
Posts: 1,149
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Re: 383 or Big Block it?
I don't know if it is the 383 or the engine management that causes the low gas mileage. I have a built 383 in a Corvette that gets GREAT economy and puts out horses. You have a couple things going against you with the truck. One is the wind signature the other is the weight.
I was always of the school that cubic inches is cubic inches.. a 396 vs a 383 should get REAL close to the same economy with all things equal.
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1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9 |
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12-17-2012, 12:26 AM
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#22 |
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I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,992
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Re: 383 or Big Block it?
I would look at the LS or maybe a GM crate 383 with an FI setup on it and OD.The BB isn't going to be as cheap to build/rebuild or probably feed over longterm.The 383 should have plenty of torque and FI would make it a bit more street friendly.
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The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil" |
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12-17-2012, 01:34 AM
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#23 |
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Registered User
Join Date: Nov 2012
Location: Rising Star, Tx
Posts: 249
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Re: 383 or Big Block it?
Change the cam to a moderate hyd roller .220 @ .050 range and drive it if you want to save money. If money is not the issue than build a big block. I love them, that's why i'm building one.
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NAME: TRAVIS TRUCK: BRUISER 71 C/10 SWB 3.5/5" drop 4.11 GEARS. F.A.S.T. BBC 408 496hp/479ft/lb JAKES 4L80E TCI TCU PTC 10.5" 2800 STALL My build thread: http://67-72chevytrucks.com/vboard/s...30#post5779530 |
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12-17-2012, 02:00 AM
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#24 |
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Registered User
Join Date: Oct 2012
Location: Arlington Washington
Posts: 1,808
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Re: 383 or Big Block it?
Big blocks are pretty cool... Just got a 402 ill be putting in mine
Posted via Mobile Device
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Scott 67 c10 sold 89 c1500 90 k2500 91 s10 #chevyonly 
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12-17-2012, 02:02 AM
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#25 |
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Senior Member
Join Date: Oct 2009
Location: Godley, TX
Posts: 17,975
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Re: 383 or Big Block it?
I have to agree with derrick - you already HAVE a good motor, but the solid lifters definitely make it not very streetable as you mentioned in the initial post. If compression ratio isn't outrageous, then that's doable.
I'd actually go a step further - if you want good mileage for a dd, then neither of those approaches is a good one. If you want performance and will accept a mpg hit, then either is a good approach. If funds permit, the LS is the best of both worlds and would make for a unique truck. |
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