350 build vs 454 swap - Chevelle Tech
Chevelle Tech General Tech Area
Please try and post in specific forums

 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 13 (permalink) Old Mar 15th, 10, 7:04 PM Thread Starter
Tech Team
Tony
 
Join Date: Apr 2009
Location: Portland Maine
Posts: 50
350 build vs 454 swap

Hi guys I joined last year when I got my 71 Chevelle but havent hung out at all since. Its spring and that means chevelle time.

I am getting 373 gears put in my ten bolt to replace the 256's in the next couple weeks . Though I think that will get the car going pretty good I feel like this might be a good year to throw some money at it. I am thinking of getting a 454ho built at a local engine building shop ($2600) but I am wondering if it would be easier and cheaper to do some things to the 350 thats in it. Its got headers, flowmasters, edelbrock intake and carb but maybe some edelbrock heads??

Any advice- Thanks
Attached Thumbnails
Click image for larger version

Name:	IMG_0307.jpg
Views:	73
Size:	103.8 KB
ID:	28822  
rawkroller is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old Mar 15th, 10, 7:06 PM Thread Starter
Tech Team
Tony
 
Join Date: Apr 2009
Location: Portland Maine
Posts: 50
Re: 350 build vs 454 swap

BTW I am not looking for a race car just something around 350-375hp
rawkroller is offline  
post #3 of 13 (permalink) Old Mar 15th, 10, 7:10 PM
Team Member
Jake
 
Join Date: Nov 2007
Location: Louisiana
Posts: 7,583
Re: 350 build vs 454 swap

You can get that out of the 350 that is in it....likely for less than $2600.

The BBC will have enough torque to make you puke though. Just don't overlook the other things that need to be done when going bigblock...exhaust, radiator, suspension, etc.

1972 Malibu Sport Coupe - Victory Red on Black - 350/TH350

I do all my own stunts.
Highway Star is offline  
post #4 of 13 (permalink) Old Mar 15th, 10, 7:28 PM Thread Starter
Tech Team
Tony
 
Join Date: Apr 2009
Location: Portland Maine
Posts: 50
Re: 350 build vs 454 swap

Highway Star - I do miss the big block torque. I used to own a gto with a 455ho in it!
Your exactly right I didnt think about the radiator and suspension.

You think aluminum heads would be the next logical step for the 350?
rawkroller is offline  
post #5 of 13 (permalink) Old Mar 15th, 10, 7:34 PM
Team Member
Jake
 
Join Date: Nov 2007
Location: Louisiana
Posts: 7,583
Re: 350 build vs 454 swap

You need to figure out what you've got...exactly....before you put a plan together for making changes. The gear change alone is going to probably give the most seat of the pants difference you'll feel.

Aluminum heads are a great idea. Maybe some new heads & a cam/lifter kit, with matching valvetrain. You're asking in the right place, that's for sure.

If you're into Edelbrock stuff, those new E-Street heads of theirs are supposed to be pretty decent. There are other heads out there too though.

1972 Malibu Sport Coupe - Victory Red on Black - 350/TH350

I do all my own stunts.
Highway Star is offline  
post #6 of 13 (permalink) Old Mar 15th, 10, 7:34 PM
Senior Tech Team
Scott
 
Join Date: Dec 2004
Location: Belle Plaine, MN
Posts: 2,643
Re: 350 build vs 454 swap

heads/cam/intake - commonly known as a top end. Upgrade that to some good quality matched components and you'll be pleased with the results.

See my Pro Touring '67 Chevelle Wagon at:
http://www.flickr.com/photos/1192966...7594110671642/

Winner- 2011 Car Craft "Real Street Eliminator" competition
Scotch is offline  
post #7 of 13 (permalink) Old Mar 15th, 10, 7:40 PM Thread Starter
Tech Team
Tony
 
Join Date: Apr 2009
Location: Portland Maine
Posts: 50
Re: 350 build vs 454 swap

I got a decent cam and intake already. I think heads would be a nice fairly inexpensive upgrade. What else do I have to do to swap the heads?....
rawkroller is offline  
post #8 of 13 (permalink) Old Mar 15th, 10, 8:17 PM
Team Member
Jake
 
Join Date: Nov 2007
Location: Louisiana
Posts: 7,583
Re: 350 build vs 454 swap

What heads are on it right now?

1972 Malibu Sport Coupe - Victory Red on Black - 350/TH350

I do all my own stunts.
Highway Star is offline  
post #9 of 13 (permalink) Old Mar 15th, 10, 9:55 PM Thread Starter
Tech Team
Tony
 
Join Date: Apr 2009
Location: Portland Maine
Posts: 50
Re: 350 build vs 454 swap

They are stock heads its a 350 crate not sure which one. How about a top end package like this
http://www.summitracing.com/parts/HLY-300-503-1/
Says its good for 425hp and 425ft lbs that would get me close to the 454 vibe for sure!
rawkroller is offline  
post #10 of 13 (permalink) Old Mar 15th, 10, 10:07 PM
Tech Team
Brian
 
Join Date: Aug 2009
Location: St. Louis
Posts: 417
Re: 350 build vs 454 swap

Since your car is complete and running, I would throw parts at the SB and save the BB option for when break the car down for a restore, if you ever plan on it

Sent from my Motorola Smartphone on the Now Network from Sprint!

71SS/L48-1 owner
92 305cid
92 700R4
12 bolt/3.31
http://s222.photobucket.com/albums/d...Chevelle%20SS/

Made in the USA - Twice
bconwayls1 is offline  
post #11 of 13 (permalink) Old Mar 16th, 10, 6:44 AM Thread Starter
Tech Team
Tony
 
Join Date: Apr 2009
Location: Portland Maine
Posts: 50
Re: 350 build vs 454 swap

Quote:
Originally Posted by bconwayls1 View Post
Since your car is complete and running, I would throw parts at the SB and save the BB option for when break the car down for a restore, if you ever plan on it
I agree after thinking about it. Plus it has been restored once not be me and a while ago but all I would do is repaint it in the next few years.
rawkroller is offline  
post #12 of 13 (permalink) Old Mar 16th, 10, 5:32 PM
Senior Tech Team
Curt
 
Join Date: Apr 2004
Location: Norcal
Posts: 1,602
Re: 350 build vs 454 swap

Hmmm... that kit is $1900, does not include a few things.

Then, throw in the cost of machine work to your existing block and you're starting to approach the cost of building the big-block pretty close... Of course, you still have exhaust, radiator, etc on the big block too but look at the bottom line, finished product...

-curt

In the immortal words of Beaux:
"The only 'done' car is a 'sold' car... "

Ours is now "done" - waiting for the day when we can afford a new one...
dittoz is offline  
post #13 of 13 (permalink) Old Mar 17th, 10, 12:38 PM
Tech Team
 
Join Date: Apr 2009
Location: Michigan
Posts: 121
Re: 350 build vs 454 swap

The Holley Systemax stuff is old technology. Those head were designed what, 10 years ago? Get some new tech stuff. I say stick to the small block with a roller cam.
Brian J is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome