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post #1 of 11 Old 06-16-2012, 08:08 PM Thread Starter
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Smallblock or Bigblock?

Sup Guys,

Just stopping in to get some opinons on what you think I should be doing with my motor. I'm really on the fence with all 3 choices and just wanted to read some other point of views.

1) Rebuild the 350 small block.

2) 400 small block

3) 454 Big Block

option 1 isn't a full strip down and build back up rebuild. Just a really simple freshening up of the motor. New cam and things of that nature. Same heads and 8.5:1 compression. I have a thing for the GM 350 motors and really want to build one of each haha.

option 2 seems like the ideal swap imo. 50 extra cubes and really only a 30-50 pound weight difference from what I've read. All my parts swap over which saves me money and not having to redo my exhaust is the biggest lifesaver imo, but if the 400 isn't a large enough power difference over the 350, I see no reason for the hassle. Only a mental ego boost not having a "everybody and their mother's engine

option 3 is pretty radical, but these 73-77 a-bodies did come from the factory with these for awhile. I'd be beyond budget on this one having to buy all new parts that wouldn't carry over from the sbc. I am also concerned with the weight difference in engines, I'm reading in a few places these engines weigh 200lbs+ over a 350. Is a power worth the extra fat? These cars are porkers to begin with (4000+)

I'm not gonna get into all the details right now but just a general opinion on what you guys would do would be cool.

Out for the night, peace guys.

EDIT: This is where I'm getting a lot of my info, i'm not exactly sure how accurate it is, but it's definitely cool to read up on. http://www.gmheritagecenter.com/gm-h...onte-Carlo.pdf

Last edited by 80s_Adam; 06-17-2012 at 03:46 PM.
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post #2 of 11 Old 06-16-2012, 08:14 PM
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Welcome Back 80s Adam... Why do you only stop by when you need something?

I would go with The 400 Small Block

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post #3 of 11 Old 06-16-2012, 10:13 PM Thread Starter
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Quote:
Originally Posted by OceanChevy View Post
Welcome Back 80s Adam... Why do you only stop by when you need something?

I would go with The 400 Small Block
OC, I just don't have the time or stength to play on the computer much. Between 2 jobs, school, a girlfriend, some social life, my couple hobbies, I just have no time for videogames/computer time... I do like to stop in from time to time when I can.

Last edited by 80s_Adam; 06-17-2012 at 03:46 PM.
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post #4 of 11 Old 06-16-2012, 10:56 PM
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Hey Adam-

Here's my two cents and I've built tons of engines in my day. Unless you are sold on a Big Block, stay away from them!! Here's what I have learned when it comes to BB Chevy's; there are those that are die hard fans and they Love them, and then there are those that really don't care. I am the latter and here's why:

1) With today's technology, you can get the same power, if not more, with a "Big" small block.

2) The cost difference is not justifiable. BB's are so expensive, and yes, I know first hand, as Jade as a 468BB in her that is a full Roller Motor.

3) Weight Difference. 200 lbs is on the low side. Most BB are probably around the area of 300-400 lbs more once you add the bigger intake, headers, valve covers... ect. Short blocks are probably closer to 200 lbs difference, but not complete turn key motors with everything bolted to them.

4) They are a pain in the @SS to work on once they are installed in your car. For example, changing header gaskets, spark plugs, removing the headers are all simple task IF you own a SB Chevy. I have to pull my entire engine if I want to remove my Driver Side Header.

5) Reliability. You can turn a small block a lot harder than you can a big block because of the rod length. Because of that, SB's normally will outlast a BB when it comes to mileage and maintenance.

If I were you, I would build a 400. You can do many things with that block from destroking it to 377 CI all the way to building a massive 454 CI monster. 400's run for ever, and you have best of both worlds; lots of power and tons of torque!! You can't beat that IMO.

I hope that helps man.
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post #5 of 11 Old 06-17-2012, 04:44 AM
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Go with the 400. Big block power in a small block package.

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post #6 of 11 Old 06-17-2012, 07:57 AM
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Always been a Big Block man.

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post #7 of 11 Old 06-17-2012, 01:49 PM
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what's wrong with a 350 build? it's a solid proven engine. new cam would probably give a decent power increase, and you can save some money on the side.

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post #8 of 11 Old 06-17-2012, 01:50 PM
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Hay Adam..miss ya

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post #9 of 11 Old 06-17-2012, 03:50 PM Thread Starter
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Quote:
Originally Posted by thedcorvette View Post
what's wrong with a 350 build? it's a solid proven engine. new cam would probably give a decent power increase, and you can save some money on the side.
Right now this is where I'm leaning. The motor only has 40k on it. I doubt I could find any 400 or 454 with that low of miles on it, but I'm not sold on anything yet.

In the future I'd like to build up one of each 350. A Chevy, Pontiac, Buick, and an Olds... I think that would be pretty cool.
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post #10 of 11 Old 06-17-2012, 06:47 PM
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Quote:
Originally Posted by 80s_Adam View Post
Right now this is where I'm leaning. The motor only has 40k on it. I doubt I could find any 400 or 454 with that low of miles on it, but I'm not sold on anything yet.
if that's the case...build a 383 out of your 350. Best of both worlds.

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