1967 impala ss convertible - Impala Tech
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post #1 of 7 (permalink) Old 10-19-2011, 01:04 AM Thread Starter
 
 
Join Date: Oct 2011
Location: Ft worth
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1967 impala ss convertible

Bought a 1967 ss convertible this weekend. Heck was scared to death of the post card size title. It has only been registered once. Haven't told my wife. Do I build it or sale it is the question. If so should I go LS or replace the 396 that was stolen by a shady restoration specialist? Is it worth it in the long run? Car was to clean to leave in a barn, literally.
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post #2 of 7 (permalink) Old 10-19-2011, 01:19 PM
BA.
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that car is no good to you, you should sell it to me and I will take care of it.

You take cash, yes?

HOW A NOVICE REBUILDS A 66 IMPALA CONVERTIBLE:
http://www.impalas.net/forums/blog.php?u=1432
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post #3 of 7 (permalink) Old 10-19-2011, 08:31 PM
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Welcome to the Team Havron!

A LS-x engine is the way to go if you want modern power. I would start with a 6.2 litter short block. Stab in a more aggressive cam and then bolt on some Mast aftermarket heads. Moroso Camaro oil pan and a Camaro accessory drive with a FAST intake and larger 101 mm big bore throttle. You will need a 4L80e transmission to hold that much power (figure on about 640 hp) and a rebuild of the rear end. Then you will have to reinforce the frame to keep from twisting up your new shinny drop top project. Since the car will idle better than a the stock big block did and be quieter as well your wife will love it up until the time that you stab the throttle.

Big Dave
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post #4 of 7 (permalink) Old 10-19-2011, 11:29 PM Thread Starter
 
 
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Who would do you recommend in Houston for handling a project like that? What is a reasonable cost, if there is a such thing with classics? Good donor for rear end big brakes? That LSX would probably have to be crate?
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post #5 of 7 (permalink) Old 10-20-2011, 06:45 AM
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I would build the engine myself personally using a used cast iron 6.2 liter truck block to get the biggest bore available. You can find one ruining with harness and controller for under $2,500 and then it is a mater of making it fit in your car (oil pan front accessory drive and intake manifold are all too big for a car). Most car blocks are 5.7 or 5.3 liter (or smaller since the factory discovered how powerful these LS engines are they are installing smaller and smaller motors every year).

With the changes I mentioned you will double the power out put and still have a very streetable car (docile and mild mannered until it steps into a phone booth and changes into a super car with the loud pedal mashed).

Big Dave
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post #6 of 7 (permalink) Old 10-21-2011, 02:12 AM
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That's where Dave and I differ, I wouldn't do the iron block unless you're planning on 800+ horsepower or tons of boost. I like the weight savings.

You can get an LS2, or LS3/L92/L99 at damn near any decent recycling yard.
You don't really need different heads (cause they aint cheap) unless you've got spare cash and are shooting for those 650hp (motor) numbers. Heck, even the aftermarket manifold could run you 700-1000 depending on which one you pick. And an aftermarket throttle-body is a few hundred as well. It adds up big quickly if you are aiming for 580+ on motor. (there's always a small nitrous shot I guess)
don't forget ancillary stuff like motor mounts, tranny mounts maybe, proper speedo conversion, ECU + reprogramming, headers for LS ain't cheap either. Plus the oil-pan Dave mentioned. Man, it's like throwing dozens of Benjamins on things after the motor purchase. (speaking from personal experience)

You can get 475-550 (motor) horsepower easily with stock heads/intake and a good cam/exhaust selection. (and knock down 23-26mpg on the highway with an OD)

personally though, I like seeing a big block in an Impala rather than an LS motor. Maybe throw one of those FAST auto-learn fuel injection units on it and hide it with an open element air cleaner,....pop for some aluminum heads if the $$ is there. Drive-ability and torque with old school cool.

HOW A NOVICE REBUILDS A 66 IMPALA CONVERTIBLE:
http://www.impalas.net/forums/blog.php?u=1432
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post #7 of 7 (permalink) Old 10-21-2011, 07:40 PM
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The LS-3 324 cid motor in my Silverado cranks out 330 horsepower and it isn't the biggest or baddest motor offered (it is one step above the smallest at 4.5 liters compared to my 5.3 liter motor). The Corvette LS-7 7.0 liter motor garners that honor at 540 horsepower normally aspirated and 670 horsepower blown. Problem is those Corvette valve covers drive up the price in a bone yard to the point where it is cheaper to buy one brand new in a box from GMPP.

I envision a head swap on any LS-x motor you find in a truck. A GTO motor out of a Pontiac G-8 is good possibility or a fourth or fifth generation Camaro motor will work as is when you find one. I would buy everything (actually buying a beater Camaro and selling what is left after you strip it isn't that bad of an idea) because you will need virtually everything on the car.

Big Dave
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