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#1 |
krazy hillbilly from Kentucky
Join Date: Feb 2007
Location: Paris, IL
Posts: 121
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638 cid Big Block in a 69 CST/10 Shortbed
I'm wanting to build a Big Block for my 69 CST/10 and badge everything up like a 396 to fool the untrained eye. I'm looking at a Dart Big M block that is capable of 4.625" bore and 4.75" stroke. I'm wanting to keep a mild cam in it and iron heads so it runs and looks close to a stock engine. Preliminary runs on my Dyno program comes up with around 750lb-ft of tq@2K RPM and 502hp@4500RPM. The question I have is: has anyone done anything close to this power range in one of these pickups and what has to be done in ways of rear end, transmission,...etc. to handle this kind of power? Also, if anyone has any parts suggestions to stuff in this engine, please advise, remember I want to keep it stock appearing and idling.
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#2 |
SLOW BUT SURE,BUT CLOSER
Join Date: Feb 2002
Location: eleanor wv usa
Posts: 3,093
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
Why? Thats alot for the street nothin' wrong with a BB but you can go to much with one.
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69 C-10, OWNED 35YRS... 350 over 30, 350 Turbo, 3:73 Posi P/S, P/B Black with red and black int. ''LOVE THESE OLD ''TRUCKS....... ![]() ![]() ![]() |
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#3 |
krazy hillbilly from Kentucky
Join Date: Feb 2007
Location: Paris, IL
Posts: 121
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
mostly bragging rights, and I want to go with something that noone else has, I know it's a lot, which is why I want to keep it tame in the cam. There's too many crate 572s being dropped in everything these days, I want something different, something that's as custom as the rest of the truck is going to be. It's not meant to be a street racer and I know I'll never be able to hook it up on the street, but I might get up the nerve to take it to the strip every now and then, to quote the infamous Carrol Shelby "Too much Horsepower is just enough" =)
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#4 |
Registered User
Join Date: Feb 2007
Location: T-TOWN
Posts: 26
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
i have a 502 in my truck and it made close to 700 hp to the back wheels and i havent had a problem with anything other than killing the tires when it leaves,and it has been 10.11@130mph weighing 4050. I also have a dart big m block,it's brand new still in box,it has billet splayed main caps
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#5 | |
krazy hillbilly from Kentucky
Join Date: Feb 2007
Location: Paris, IL
Posts: 121
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
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#6 | |
Registered User
Join Date: Feb 2007
Location: T-TOWN
Posts: 26
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
Quote:
Here is a short vid http://videos.streetfire.net/search/...5b88d75b10.htm Last edited by Farmtruck71; 02-28-2007 at 06:03 AM. |
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#7 |
krazy hillbilly from Kentucky
Join Date: Feb 2007
Location: Paris, IL
Posts: 121
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
That truck is just crazy man, I hope mine runs that good when it's done. Thanks for all the technical advice guys, I've never really had experience with hp numbers that high before in a truck, so I wasn't sure what it was gonna take, so now I have a better understanding, THANKS EVERYBODY! I will start a build thread for my 69 Shortbed when I start on the restoration(as soon as it gets warm outside, haha)
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1969 Chevy CST/10 "Old School lives and breathes in the heart of a chosen few ![]() 1984 Chevy C10 Silverado "Life, Liberty, and Ford's Pursuit of Chevy taillights" You say "Obsessed with my trucks" like it's a bad thing |
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#8 | |
krazy hillbilly from Kentucky
Join Date: Feb 2007
Location: Paris, IL
Posts: 121
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
Quote:
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1969 Chevy CST/10 "Old School lives and breathes in the heart of a chosen few ![]() 1984 Chevy C10 Silverado "Life, Liberty, and Ford's Pursuit of Chevy taillights" You say "Obsessed with my trucks" like it's a bad thing |
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#9 |
Registered User
Join Date: Feb 2007
Location: T-TOWN
Posts: 26
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
The guy in the camaro is a friend of mine so we raced for the fun of it.The camaro has been to the PGD's(pump gas drags) before and placed in the top 5, it has run 8.80's on BFG Radials with the power coming from a all aluminum 632ci and a glide. Thaty night i think my truck went 10.22@129
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#10 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,858
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
Somrthing cool about an old truck with way more power than you "need."
![]() In a simular subject.I bought a truck a while back that was an origunal big block truck,still very original.I restored it all original but used an LS6 crate motor using all the 402 stuff on top and painted everything factory colors and used factory stickers.It was powerful,reliable,yet I showed it as original.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#11 |
Senior Member
Join Date: Jan 2005
Location: Loveland Co.
Posts: 3,098
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
I can't imagine anything rearend or suspension wise would break until you try to make it hook up. As long as the tires are the weakest link you SHOULD be o.k.
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Chris 74 Custom Deluxe SWB 350/350/3.73’s 99 2wd Silverado RCSB 5.3/4L60/3.90’s http://www.classictrucks.com/feature...short_bed.html |
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#12 | |
Sinister Exaggerator
Join Date: Feb 2006
Location: Eugene, Oregon
Posts: 111
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
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69 c10 Chevy Long Fleet 350/350 *under construction* Poor man's disc brake upgrade with HydroBoost from '82 diesel Blazer tank with "John Fabris" stake pocket filler (Genius!) |
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#13 | |
krazy hillbilly from Kentucky
Join Date: Feb 2007
Location: Paris, IL
Posts: 121
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
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#14 |
Registered User
Join Date: Dec 2006
Location: Rhode Island
Posts: 602
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
Gotta love those BBC SWB C-10's. You're singing the song I love to hear.
No experience with an engine that big, but (but I'd love to). One thought though. Due to the "swept volume" of the cylinders that have to be filled, what would notmally be a very radical cam on a smaller engine would be tamer on a huge engine like the 638. So, don't underestimate how much cam it needs to even be "tame". Talk to the cam experts with your requirements. Regarding the anticipated performance, please let us know if you'll be using a neck brace or high back bucket seats. Thanks.
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69 C-10 SWB Fleetside 454/TH400 (For Sale) http://67-72chevytrucks.com/vboard/c...ct=1299&cat=12 70 El Camino 454 TH700 29 Model A 4-DR Sedan Deluxe |
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#15 |
Account Suspended
Join Date: Mar 2003
Location: ** THE FALL GUY **CHICAGO IL
Posts: 5,883
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
hello heres a picture
dart big block 638 ci 10:1 comp $20,000 engine clink the link in my signature thats what one sounds like Last edited by rage'nrat638; 07-12-2007 at 06:56 AM. |
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#16 |
KEEP ON TRUCKIN'
![]() Join Date: Jun 2005
Location: Sterling, Va.
Posts: 5,731
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
Damn, that rat sounds great.
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JIM '97 GMC Sierra K1500 '95 Chevy Silverado C1500 '71 Cheyenne Z71 / LT1 & 4-Speed SWB K/10 ![]() http://www.youtube.com/watch?v=4l689JKXPnA http://67-72chevytrucks.com/vboard/payments.php "LIVIN' FREE FOREVER" ![]() |
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#17 | |
Registered User
Join Date: Dec 2006
Location: Rhode Island
Posts: 602
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
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69 C-10 SWB Fleetside 454/TH400 (For Sale) http://67-72chevytrucks.com/vboard/c...ct=1299&cat=12 70 El Camino 454 TH700 29 Model A 4-DR Sedan Deluxe |
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#18 |
krazy hillbilly from Kentucky
Join Date: Feb 2007
Location: Paris, IL
Posts: 121
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
well, I'm not going that crazy with it. I'm gonna have iron heads, mild cam, and decently quiet exhaust on mine. I can't go that crazy with it, I'd kill myself first time out. I'm gonna "stock it out" though. It's gonna be a cruiser, a Saturday night bragger. To the untrained eye with all the 396 badges and mild cam, iron heads, quiet exhaust, and aluminum intake; I can pass it off as a 396. I dunno, haven't made the final decision on whether I wanna put it out there and let the world know that I got the big Dog under the hood or not...still thinking...
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1969 Chevy CST/10 "Old School lives and breathes in the heart of a chosen few ![]() 1984 Chevy C10 Silverado "Life, Liberty, and Ford's Pursuit of Chevy taillights" You say "Obsessed with my trucks" like it's a bad thing |
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#19 |
I survived Dead Man's Curve.
Join Date: Apr 2006
Location: The Nine-Five-687
Posts: 389
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
Wow, that 638 is coming to eat people! That thing sounds like a beast.
I believe someone said "Everybody is dropping in a 572 these days, I want to do something different." Well, I admire your drive to go larger, but I know I sure as Hell don't have a 572! I wish! So... hook a brotha' up if you have any lying around.
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"The people should not be afraid of their government. The government should be afraid of it's people." "The Hurricane" 1967 Chevrolet C10 350 Eight Cylinder, 700R4 BowtieOverdrive Cherry Bomb... Disturbing the Peace Since 1968. ![]() |
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#20 |
krazy hillbilly from Kentucky
Join Date: Feb 2007
Location: Paris, IL
Posts: 121
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
Now you've gone and done it. Now I'm gonna have to have the smile surgically removed from my face after hearing and seeing that 638. As for the 572 comment, I'm just saying that the 572 is a very popular custom vehicle engine these days, I don't want anything about this truck to be the "norm" It's easy to say, "I've got a 572 crate engine in there", lots of custom car builders choose that engine, and I'm not saying it's a bad engine, cuz I love the 572, I'm just saying that it's cooler to push it to the limit and say "it's a 638 cubic inch Big Block that I built in my garage" But at the same time, badge it up as a normal 396 so the untrained eye won't know what it really is.
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#21 |
Registered User
Join Date: Nov 2006
Location: Salina, Utah
Posts: 35
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
Yeah hook me up with a 572 too. Just teasin, even though copperhead had one in it and look at it, i would still rather have your 638 I mean wowwwwwwwwwwwwww.
Last edited by 67chev"BIG-Bertha"; 02-28-2007 at 06:38 PM. |
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#22 |
krazy hillbilly from Kentucky
Join Date: Feb 2007
Location: Paris, IL
Posts: 121
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
I'll build you one, or I got catalogs you can order a 572 from...lol. No, seriously, 572's are awesome, they are a monster of an engine. My thing is, pick up the last 5 copies of Super Chevy or one of those mags and flip through and look how many 572s are out there these days, a lot of people have them, you don't see too many 638s though. I guess cuz they don't make a 638 crate, but I think the engine should be just as much your creation as your custom vehicle is, if you do all that work to the body and chassis, why would you want to drop in a "Kit-in-a-box" engine? Shouldn't it be as much built by your hands as the vehicle it's going in?
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1969 Chevy CST/10 "Old School lives and breathes in the heart of a chosen few ![]() 1984 Chevy C10 Silverado "Life, Liberty, and Ford's Pursuit of Chevy taillights" You say "Obsessed with my trucks" like it's a bad thing |
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#23 |
Broken Down
Join Date: Dec 2006
Location: Choctaw, Oklahoma
Posts: 1,267
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
Good luck on your project!!! hope you don't break your pocket book on it
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kenm78 1982 Chevy 4X4 Project truck ![]() ![]() ![]() ![]() “It’s better to keep your mouth shut and let people wonder about your ignorance, than open your mouth and reveal all doubt” |
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#24 |
Account Suspended
Join Date: Mar 2003
Location: ** THE FALL GUY **CHICAGO IL
Posts: 5,883
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
get ready to spend some cash i spent $10,000 fixing stuff i broke
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#25 |
krazy hillbilly from Kentucky
Join Date: Feb 2007
Location: Paris, IL
Posts: 121
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Re: 638 cid Big Block in a 69 CST/10 Shortbed
What all did you break with that engine? Have you ever had it on a dyno to see how much it puts out? As for breaking my budget...yeah, it's gonna be a while, I'm gonna do a close to stock 350 or a nice 500hp 406cid SBC for now and do the body and interior up, then we'll start on the dragon's breath under the hood. Maybe that's what I'll name the truck "Dragon's Breath" Lay down a black basecoat, then spray green glitter paint lightly over the top, then seal it all with a good covering of clearcoat. Then I'll have to have the thunder under the hood,
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