C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Big block install in a 70

Thread Tools
 
Search this Thread
 
Old Sep 4, 2016 | 10:46 PM
  #1  
Duntov's Avatar
Duntov
Thread Starter
Drifting
20 Year Member
 
Joined: Aug 1999
Posts: 1,451
Likes: 84
From: Round Rock TX
Default Big block install in a 70

I'm preparing to install my engine that hasn't been in the car for over 20 years. I wasn't the one that removed the big block, but will be the one putting it back in. What can be on the engine for installation? Can I leave the exhaust manifolds on? How about the power steering and alternator?

I'm not going to have the AC compressor or the brackets on. Not planning on having the trans attached either as will be doing this with jack stands and regular engine hoist. Any special recommendations to support the engine while the trans is installed? The distributor will also be out to avoid the clearance issue with firewall.

This will be the first time installing a big block, and first time putting an engine in a corvette. Trying to plan things out some before the install is attempted, and also learn from others.
Reply
Old Sep 5, 2016 | 10:11 AM
  #2  
A88FXRS's Avatar
A88FXRS
Racer
10 Year Member
 
Joined: Dec 2007
Posts: 374
Likes: 12
From: PHILADELPHIA PA
Default

much easier to lower trans and engine together. tilt down and in as engine lowers into bay. exhaust can stay but not sure about power steering pump and front cross member fit. alt can go on as well.
Reply
Old Sep 5, 2016 | 01:38 PM
  #3  
jnb5101's Avatar
jnb5101
Le Mans Master
 
Joined: Jul 2006
Posts: 8,117
Likes: 104
From: charlotte north carolina
Default

Is the radiator in or out? 4 speed or auto? If the radiator is installed and it's a 4 speed car, it's tough to drop the engine-trans assembly because the tail will hit the crossmember. It can be done but for a first-timer, make your life easy-attach the trans once the engine is set. The fewer accessories on the engine, the more room you will have.
On the other hand, if the radiator is out the trans-engine assembly can be easily set.
There is no advantage to attaching the manifolds or accessories before the engine drop, as they can easily be attached later.
Unless you have a REALLY long arm on your hoist, the car has to be approached from the side with that side's wheel removed. Also, the jack stand on that side will have to be on the frame extension(as far forward as possible) to clear the hoist's legs. Every time I set an engine, I used bottle jacks under the frame near the door hinges so that the car could be lowered as the engine was swung over the fender(the lower the hoist's arm, the longer the reach) and then the car was raised and stands were set. If you do this, the rear wheels must be on platforms so the car can roll back and forth as the bottle jacks raise and lower.
I worked alone, so I took advantage of all the mechanical help available to me.
Reply
Old Sep 5, 2016 | 06:49 PM
  #4  
Duntov's Avatar
Duntov
Thread Starter
Drifting
20 Year Member
 
Joined: Aug 1999
Posts: 1,451
Likes: 84
From: Round Rock TX
Default

It a 4 sp and the radiator is out but core support is still there. It does have AC so the passenger side exhaust manifold is a PITA to get to from what I can tell. I'm using the harbor freight 2 ton collapsing engine hoist, as it seems pretty much the same as the others out there.
Reply
Old Sep 5, 2016 | 07:57 PM
  #5  
texas jim's Avatar
texas jim
Racer
10 Year Member
 
Joined: Oct 2003
Posts: 424
Likes: 9
From: Killeen Texas
Default

Just a comment; it's tight enough w/ a sbc, "more power to you guys" turning wrenches on a bbc in that tight engine compartment!!! Love the early C3s!!!
Reply
Old Sep 5, 2016 | 09:10 PM
  #6  
BBCorv70's Avatar
BBCorv70
Melting Slicks
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2007
Posts: 3,189
Likes: 111
From: Tolland CT
Default

I've had my BB out a few times, also a 70. First time, long ago, I think I reinstalled the engine without the transmission, installed the transmission afterward. Second time the body was off... You may be able to install with the transmission attached to the engine though I think it may be much harder, not being able to drop it in from the front, tougher to move the car if the hoist comes in from the side.
Reply
Old Sep 11, 2016 | 11:02 PM
  #7  
crf311's Avatar
crf311
Melting Slicks
20 Year Member
Conversation Starter
All Eyes On Me
Liked
 
Joined: Jan 2003
Posts: 3,029
Likes: 94
From: meraux LA
Default

Having the fuel pump off makes it easer.
Reply

Get notified of new replies

To Big block install in a 70





All times are GMT -4. The time now is 04:04 PM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE