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

install 1990 engine into 1976 corvette

Thread Tools
 
Search this Thread
 
Old May 13, 2019 | 08:13 PM
  #1  
Myoldvette76's Avatar
Myoldvette76
Thread Starter
6th Gear
 
Joined: May 2019
Posts: 6
Likes: 0
Default install 1990 engine into 1976 corvette

Hi, I am installing a 1990 corvette engine L98 into my 1976 corvette. The 76 had a 14 flywheel and a push clutch.The 1990 has a 11 inch flywheeel and
a hydraulic pull clutch. does anyone know if there is a 11 inch push clutch and pressure plate available to install in the 1990 flywheel which will allow me to keep the original fork and bell housing and rod system . Thanks for your help.
Reply
Old May 13, 2019 | 08:29 PM
  #2  
jackson's Avatar
jackson
Le Mans Master
 
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Default

There're TWO threads in this C3 tech forum

We already Know 76 flywheel does Not fit 90 crankshaft.

? What size is 76 flywheel? 153 Teeth or 168 Teeth?

? Do you have 90 flywheel?

? What size is 90 flywheel? 153 Teeth or 168 Teeth?

? Will you use 76 bellhousing or 90 bellhousing?
Reply
Old May 13, 2019 | 08:49 PM
  #3  
Myoldvette76's Avatar
Myoldvette76
Thread Starter
6th Gear
 
Joined: May 2019
Posts: 6
Likes: 0
Default

the 76 has 168 teeth.
the 90 has 153..
i have the flywheel for the 90. it takes a 11 inch clutch
i would like to use the 76 bellhousing with the push fork
if i were to get a 90 bellhousing then i would have to go to
a hydraulic clutch. that is what i am trying to avoid.
also the 90 bellhousing will not except my trany which is a 5 speed tremic.
Reply
Old May 13, 2019 | 09:00 PM
  #4  
jackson's Avatar
jackson
Le Mans Master
 
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Default

does your tremec have 21 spline input shaft?

some small (153T) flywheels have 2 or 3 bolt patterns ...
... have you tried your 76 disc & pressure plate (cover) on the smaller 90 flywheel yet?
Reply
Old May 13, 2019 | 09:06 PM
  #5  
jackson's Avatar
jackson
Le Mans Master
 
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Default

FWIW ... unless you have an adjustable aftermarket starter ... you have to change starters when switching between 153T-168T.
Reply
Old May 13, 2019 | 09:16 PM
  #6  
Myoldvette76's Avatar
Myoldvette76
Thread Starter
6th Gear
 
Joined: May 2019
Posts: 6
Likes: 0
Default

the tremic is a 26 spline.
the 76 flywheel is 14 inches.
the 90 is only 11.5 the disc is 11.
i have the starter that goes to the 90
Reply
Old May 13, 2019 | 09:39 PM
  #7  
derekderek's Avatar
derekderek
Race Director
 
Joined: Jul 2015
Posts: 13,082
Likes: 3,399
From: SW Florida.
Default

So get a 168 tooth 87-up flywheel. Same bell, clutch and starter. Except early starter field housings need a notch cut to clear dipstick. Now start shopping for electric fuel pumps.
Reply
Old May 13, 2019 | 11:01 PM
  #8  
jackson's Avatar
jackson
Le Mans Master
 
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
Default

How about this one for 153T
https://www.summitracing.com/parts/sum-700812/overview/
Reply

Get notified of new replies

To install 1990 engine into 1976 corvette

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-1

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-2

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer
story-3

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-4

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-5

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-6

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
story-7

10 Things C8 Corvette Owners Hate (But Won't Tell You)

 Joe Kucinski
story-8

10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

 Brett Foote
story-9

Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

 Joe Kucinski




All times are GMT -4. The time now is 11:58 PM.

story-0
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-1
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-2
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
story-3
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-4
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-5
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-6
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-7
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-8
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-9
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE