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GM Goodwrench 350 build

 
tchavers92
I love my Chevy Chevette!
Posts: 24
Joined: 09/11
Posted: 09/26/11 11:38 AM

I am buying a used 4 bolt main gm goodwrench 350. I need some guidance on rebuilding it. I need to know if the bottom end of the motor and heads could support a bigger cam intake and a carb. I think it is a tbi engine with the swirl port heads. I am going to go through it and replace the gaskets and check the bearings and replace if needed. What else should I do? what would be a good cam for this motor? intake and carb? I may be buying the newer style vortec heads for it.

Any suggestions?  

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chevelle83
I mow my lawn and find Chevys
Posts: 2280
Joined: 11/09
Posted: 09/26/11 06:31 PM

a stock mild engine is great for a stock daily driver,,,,,,,,,,,,,

what duty is the engine gonna be up to?  car? truck? race?  

its best to build the engine for the intended use.  

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tuffnuff
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Posts: 7841
Joined: 12/09
Posted: 09/26/11 06:49 PM

Vortec heads in stock trim will only support .460" lift,,, max.

Smile  
When The Flag Drops.,.

tuffnuff

The Bull ***t Stops.,.
tuffnuff

P. Engineer, Engine Builder

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redneckjoe69
I mow my lawn and find Chevys
Posts: 2337
Joined: 03/10
Posted: 09/27/11 11:38 AM

more info. Wink  

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tchavers92
I love my Chevy Chevette!
Posts: 24
Joined: 09/11
Posted: 09/27/11 11:45 AM

Im just wanting wanting to build a good strong motor that can be driven daily without making me go bankrupt. I guess a street/strip motor?  

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tchavers92
I love my Chevy Chevette!
Posts: 24
Joined: 09/11
Posted: 09/27/11 11:51 AM

Sorry. Didnt mean to post that so many times. It said there was an error  

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redneckjoe69
I mow my lawn and find Chevys
Posts: 2337
Joined: 03/10
Posted: 09/27/11 11:55 AM

if your gonna tear it down, get new cam bearings & freeze plugs.    one way to build your engine is around your cam.   that will determine the compression you should shoot for, & the heads, carb, & intake, etc.     the more info you can give these guys, the better.     i see street/strip.    what kinda car is it?   auto/manual?   rear gear?  are you willing to swap gears if need be?   willing to buy an aftermarket stall converter?   how much street use?    this will aid in picking out a cam.  

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tchavers92
I love my Chevy Chevette!
Posts: 24
Joined: 09/11
Posted: 09/27/11 12:06 PM

I am going to tear it down so should I get a master rebuild kit? It is automatic has the old 700r4 in it. I am considering a stall converter and i want to put 3.73 gears in the rearend. I dont want nothing real radical just a reliable truck that can get up and go when i want it to.  

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Pontiacman2
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Posts: 8956
Joined: 09/08
Posted: 09/27/11 12:57 PM

Icon Quotetchavers92:
Sorry. Didnt mean to post that so many times. It said there was an error

No biggie I removed the extras.
Next time just give it some time and the post will appear.  
Pontiacman2
Pontiacman2

Professional Hi-performance engine builder

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tchavers92
I love my Chevy Chevette!
Posts: 24
Joined: 09/11
Posted: 10/02/11 09:35 PM

Any more advice?  

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chevelle83
I mow my lawn and find Chevys
Posts: 2280
Joined: 11/09
Posted: 10/02/11 09:52 PM

350 block,,,,,

master engine kit is fine, just specify,,
flat top pistons
460-488 cam
summit 2.02 heads
headders
650 cfm carb
performer rpm or similar intake
roller rockers

3.73 gears are great with a 700r in a truck

drive 100K miles and enjoy.  

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tchavers92
I love my Chevy Chevette!
Posts: 24
Joined: 09/11
Posted: 10/02/11 10:14 PM

looks like some good mild performance parts. just about what i was thinking. Thanks for the help  

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tchavers92
I love my Chevy Chevette!
Posts: 24
Joined: 09/11
Posted: 10/03/11 05:56 AM

what do you mean by a 460-488?exhaust lift? Also the heads what is the 2.02 referring too? would a comp magnum 260hr cam be good for a daily driver?  

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chevelle83
I mow my lawn and find Chevys
Posts: 2280
Joined: 11/09
Posted: 10/03/11 08:11 AM

uh,, that is a 4.3 v6 cam.

I am referring to the gross valve lift, in other words dont go huge with the cam  simply cause it will kill bottom end torque (under 2000 rpm )

look at summits site and check out their name brand cast iron heads, I love em they cost $750 out the door ready to bolt on.  

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tchavers92
I love my Chevy Chevette!
Posts: 24
Joined: 09/11
Posted: 10/03/11 08:56 AM

yeah i typed that in wrong. are the summit heads better than the gm performance vortec heads?  

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