638 cid Big Block in a 69 CST/10 Shortbed

[Farmtruck71]

Originally Posted by bhunt31

Wow, that's a lot of horses to the back wheels. That's the block I'm looking at, so you're running the stock rear end, gears, and suspension and it holds it? What kind of tranny are you running? Does your 502 idle smooth or not? How does it get around on the street, like from stoplights and such during normal driving? I want to be able to drive the thing, I just want the "impressive factor" there when I need it. I live in a small town and people around here are scared to death of anything that has a big block in it, let alone a 638cid Big Block, so it'd be the top dog around here when I get it built.

when it made that hp number it had a 275 shot, it now has a 350 shot going through the NOS Big Shot plate. The rearend is the stock 12bolt with a detroit locker,3.73. gears,stock axles,and i run 29.5x10.5"S" slick. The tranny is a turbo 350 with a full manual valve body,4" race pan, and a Neal Chance bolt 2gether convertor. As far as how it idles, it idles good,very crisp,clean sounding,and the cam is around 700 lift with the 1.8 Jesel shaft mounted rocker arms thats on it. My truck is pump gas friendly, last summer i used to drive it all the time around town, going to cruise nights, its a blast to see the look on peoples faces when you pull up behind them in traffic and their rear view mirror is shaking.
Here is a short vid
http://videos.streetfire.net/search/...5b88d75b10.htm

[powell72]

Originally Posted by underdog8704

just my opinion- if your going to spend that much coin on a motor of that magnitude, why wouldnt you try to get all the power out of it you could? You can make 500hp easy on a supercharged 350 for a fraction of the cost. again, just my opinion.

A mild 638 will be way more streetable than a supercharged 350 and run just as good. It's all about the inches.

[bhunt31]

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)

[67chev"BIG-Bertha"]

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.

[mnunn454]

Originally Posted by rage'nrat638

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

Yeah. That'll sure pass for a 396.

[bhunt31]

Originally Posted by mnunn454

Yeah. That'll sure pass for a 396.

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...

[Cochise]

I'm still holdin' out for Overhaulin'

[bhunt31]

Originally Posted by 67chev"BIG-Bertha"

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.

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?

[bhunt31]

Originally Posted by Farmtruck71

when it made that hp number it had a 275 shot, it now has a 350 shot going through the NOS Big Shot plate. The rearend is the stock 12bolt with a detroit locker,3.73. gears,stock axles,and i run 29.5x10.5"S" slick. The tranny is a turbo 350 with a full manual valve body,4" race pan, and a Neal Chance bolt 2gether convertor. As far as how it idles, it idles good,very crisp,clean sounding,and the cam is around 700 lift with the 1.8 Jesel shaft mounted rocker arms thats on it. My truck is pump gas friendly, last summer i used to drive it all the time around town, going to cruise nights, its a blast to see the look on peoples faces when you pull up behind them in traffic and their rear view mirror is shaking.
Here is a short vid
http://videos.streetfire.net/search/...5b88d75b10.htm

That's crazy man, looks like you went against a beast of a camaro. Who cares though, right? You still ran 10s!!! That's just awesome, I love to see them old trucks show the new age cars they can still run with the best of them.

[Farmtruck71]

Originally Posted by bhunt31

That's crazy man, looks like you went against a beast of a camaro. Who cares though, right? You still ran 10s!!! That's just awesome, I love to see them old trucks show the new age cars they can still run with the best of them.

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

[AKChevyman]

I enjoy a big block I have two but a friend of mine is sticking an all aluminum 638 in his 57 Chevy pickup I told him he is crazy because the 600Hp 396 he has now scares the hell out of me. Well good luck and I look forward to your progress.