1985 chevy c10 swb

[mwooten92]

Originally Posted by nbpro

the motor could be a 302 327 or 350 2 or 4 bolt mains

this is for the 3970010 block

3970010....302.....69....4...Z-28 Camaro
3970010....327.....69....2...Trucks and industrial
3970010....350...69-80...2 or 4



the only difference is the 327 3970010 block was a truck industrial motor as you can see.

In 1968 they made 327's with this casting number but they were only 2 bolt main.

Then from 1969 - 1979 they made 350's with this number and they were either 2 or 4 bolt main.

If it's a 4 bolt main, then you know it's a 350.


Hope this helps

yup thats is what i read about the block on google.. our motor stand is busy holding a other motor as u might see in the pictures so i wont be able to see if it 4 or 2 but either way its bigger then a 305! haha wish i new more about this motor though. could help in the long run. owel..

[nbpro]

i here you on the 305 we going with a 400 sb

[mwooten92]

so we got the intake painted on the motor and got the motor droped in the truck just taking our time puttin it all back together. Knowing its a earlier model block and diffrent carb might have to do some rewiring and vacuum lines and such.. hopefully running by the weekend

[mwooten92]

[manimal]

Wow, you have done a very nice job!

[mwooten92]

Thx i really appreciate it. Its a very time consuming project lol
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[3r!c84]

what kind of rollor rockers are thos? brand and size? 1.5?1.6?

[mwooten92]

Originally Posted by 3r!c84

what kind of rollor rockers are thos? brand and size? 1.5?1.6?

Man.. I wish i could tell you. This motor was in a truck that was a tow in and never claimed. So we dont even know much about it. We were even surprised it had these in it. We still dont really know if it has anything internally. Maybe a mild cam. So ya. I dont know
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[JohnC]

Looks good man!

[mwooten92]

Thx
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[87 chevy silverado]

looking good cant wait till mines done

[mwooten92]

heres a pic of the motor in the truck with headers bolted up and carb on. still gotta get these wires situated and vacuum lines and new plug wires.. btw when the motor was out we replaced some broken lines on the transimision and replaced the front seal. when the motor is all in and running we will replace the rear seal, transmission mount, and the u joints in the drive-shaft. hopefully this trans doesnt leak anymore fluid!

[mwooten92]

today we got some done.. swapped out distributors from the original motor onto the new motor, swapped spark plug wires, ran gas lines, vacuum lines ,and wires. got new valve gaskets and mounted the covers in place. put a new thermostat in. Mounted alternator, ac compressor and power steering mounted the fan back on.. bought a new throttle cable.. hopefully firing it up tomorow

[87 chevy silverado]

how do u like ur headers i have some old ones that look just like that and there a pain to put on

[mwooten92]

Originally Posted by 87 chevy silverado

how do u like ur headers i have some old ones that look just like that and there a pain to put on

ya they weren't to bad to get on just they get really hot and like to burn up your spark plug wires.

[mwooten92]

got the truck back running today and drove it up to the shop with open headers. man it was LOUD! we need to set the timing on it and get the mufflers back on it before i can drive it daily though

[87 chevy silverado]

Originally Posted by mwooten92

ya they weren't to bad to get on just they get really hot and like to burn up your spark plug wires.

what gaskets did u use

[3r!c84]

Originally Posted by mwooten92

looks good. but ditch that little aircleaner. i had my friends little one on my motor till i orderd a big one that fit over the holley. but it realy chokes it out. need more air flow

[benoit454]

we ran a smaller air cleaner then that and it didn't choke out. Looks like a 10 inch or so, that's pretty good sized. if anything change the filter itself to either a taller one, or just a reusable style. The one we had is like a 6 inch it's barely bigger then the carb flange.

I ordered a 14 inch for my 88 to cover up the tbi and all that crap.

It's up to you but I never had any problems with ours and yours is bigger. So if you wanted you could go taller, or reusable for more flow or go with a bigger dia. one.

Ours was and is a daily driver so it didn't see much high rpms so maybe that comes into play somewhere but for us it was fine. I was kinda thinking you don't need 2 breathers in one valve cover or two breathers period really.

[3r!c84]

hmm probably wont feel it as much with a stock motor. i know it was night and day from that little thing and a big one. even with a stock style filter.

[mwooten92]

Well i do plan on getting new vavle covers and maybe a new cleaner. I did get rid of the yellow burnt up spark plug wires though and put black ones on.
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[benoit454]

aaaww I like the yellow ones. The VC's don't look too bad mothers chrome polish can really shine them up, but you can get dress up kits dirt cheap, some have valve cover's and air cleaner assemblys. I just bought one for my 88 for like $22 and it was a 14 inch and they have valve covers dirt cheap.

summit, jegs, ebay, streetsideauto, amazon, tons of places so shop around for the best deal and maybe free shipping.

As for stock good point, might be the difference ours was stock.

[mwooten92]

The valve covers on it have been cut up on the sides where the studs come through. Idk why the guy that had the motor before did what he did but he butchered it. We straightened the edge on them and put some new gaskets on so hopefully it won't leak.

Autozone has a nice set of stamped valve covers. Chrome and says Chevrolet on the top. For like 65 bucks.
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[benoit454]

you can get those cheaper online they are made by gm performance parts or proform, most likely proform and cheaper. it has the bowtie then says chevrolet? If so then it's the same ones I'm talking about. Also forgot to say that you have roller rockers and tall valve covers now, better make sure to try and get tall ones or the rockers may hit on the short ones.

[mwooten92]

Originally Posted by benoit454

Also forgot to say that you have roller rockers and tall valve covers now, better make sure to try and get tall ones or the rockers may hit on the short ones.

Ya I need the clearance. My covers are about 3.5 inches tall. I'll have to look it all up.
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