Good news for me...I think
#11
10-21-2010 | 11:46 AM
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Joined: Sep 2010
Posts: 36
Bottom dead center on the front is your balancer, it is what is commonly marked with a mark for timing too. The thing on this pic with all the markings is a really fancy one but it shows you where it is. http://img141.imageshack.us/i/img0391afg2.jpg/
#12
11-24-2010 | 10:22 PM
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Joined: Nov 2010
Posts: 9
400 small block freeze out plugs
The 400 has 3 freeze plugs instead of 2 like the 350 and it is externally ballanced so the harmonic ballancer looks all goofy. I thought I had just a 350 til I seen that ballancer and asked a mechanic about it. I think my stock torque was 295 from the factory. But 30 years later I'm sure its dropped a bit. I used to have this enging in a 6000lb burb and when pullin a car you didn't even feel it
#13
11-24-2010 | 10:27 PM
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Joined: Nov 2010
Posts: 9
Actually if it is a 400 its probably still a smallblock which is physically the same size as the 350 The only block of this family, 400 cu in (6.6 L) small-block, was introduced in 1970 and produced for 10 years The reason for the cooling issues in these engines were usually because people put heads on them that had no steam holes,the difference in the 400 to other sbc were the cylinders were siamesed. The reason it is the same physical size as other small blocks is it had a 4.125" bore and 3.75" stroke while the other 327 and 350's had a 4.00" bore and 3.25" stroke.
You can take a 350 block and put a 400 crank with a 3.75" stroke and build a 383 cu in motor with some clearancing in the bottom end.
You can take a 350 block and put a 400 crank with a 3.75" stroke and build a 383 cu in motor with some clearancing in the bottom end.
#14
11-25-2010 | 01:06 PM
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Joined: Oct 2010
Posts: 21
Destroked 372 is what you would have then, 30 over would be a 377. Which oddly enough is what you have if you use a 400 crank in a 350 not bored 30 over :P
Last edited by WarrenC; 11-25-2010 at 01:09 PM.
#15
11-28-2010 | 10:04 AM
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Joined: Nov 2010
Posts: 9
400 Over Heating Problem
The problem is junk builds up around the freeze out plug area in the inside area, I rebuilt the engine, i pulled the freeze out plugs and cleaned out the junk inside the block and put it back together and never have had any problems what so ever. Runs at 180* what the thermostat calls for.
#16
11-28-2010 | 10:10 AM
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Joined: Nov 2010
Posts: 9
I have allways been told it would be a 373, same differance, just sounds better, you tell people that it is a 373 and they think i'am crazy, they say no, that is a Road-Runner motor, cracks me up on what some of my friends actually no about good old small blocks, i also don't have no clerance issues, the cheapest way to go and still have plenty of power.
Last edited by Speedy_Boy; 11-28-2010 at 10:28 AM.
#17
11-28-2010 | 10:16 AM
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Joined: Nov 2010
Posts: 9
400's
i have the 400 on my fullsized truck now. i love it. it kicks the crap out of any 350 i have. lot of torque in these engines. i think the 400 may have came in some of the older 70s blazer. mine came out of a 1973 something. lot of claims of the 400 over heating because of the cylinder walls being so thin but i never ran into that issue
1970's Chevy car's had 400 small block's in them to.
#18
11-28-2010 | 10:22 AM
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Posts: 9
Balancer
#19
11-28-2010 | 02:07 PM
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Joined: Aug 2009
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From: munster indiana
#20
12-01-2010 | 03:12 AM
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Joined: Jan 2007
Posts: 267
From:
I have allways been told it would be a 373, same differance, just sounds better, you tell people that it is a 373 and they think i'am crazy, they say no, that is a Road-Runner motor, cracks me up on what some of my friends actually no about good old small blocks, i also don't have no clerance issues, the cheapest way to go and still have plenty of power.