Notices

Small-block Meaurements?

Thread Tools
 
Search this Thread
 
Old May 2, 2012 | 09:33 PM
  #1  
Gary Lewis's Avatar
Gary Lewis
Thread Starter
|
FTE Legend
15 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Small-block Meaurements?

Hello from the 80-86 forum, where I usually hang out. Anyway, I'm looking for some measurements from a 302/351W with a true flywheel on it, not a flexplate. The measurements are to determine if a small-block input shaft for a ZF5 would resolve some of the issues when mating one of the 460 versions of the ZF with a 351M/400.

Specifically, I'm looking for:
The distance from the rear face of the flywheel to the rear face, the tranny-mounting flange, of the block
The distance from the rear of the pilot bearing to the rear face of the block.

Or, if someone has just the flywheel, I need the distance from the rear of the crank pocket to the rear face of the flywheel. IOW, the thickness of the flywheel less the depth of the crank pocket. That's because I have a 351W which I can measure and, with your dimensions, figure it all out. Oh yes, I'd like the dimensions on the pilot bearing as well.

Thanks in advance!
 
Reply
Old May 4, 2012 | 05:39 AM
  #2  
baddad457's Avatar
baddad457
Hotshot
20 Year Member
Liked
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
I don't have the measurements, but I do know the 460 ZF input doesn't work for a small block.
 
Reply
Old May 4, 2012 | 07:22 AM
  #3  
Gary Lewis's Avatar
Gary Lewis
Thread Starter
|
FTE Legend
15 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Originally Posted by baddad457
I don't have the measurements, but I do know the 460 ZF input doesn't work for a small block.
No, the 460 input shaft is much too large for the small-blocks. But, that was never being considered. What is being considered is putting a small-block input shaft in a big-block ZF to gain spline engagement with the clutch, and pilot bearing engagement as well, when used with a 351M/400.

The problem is that the 460's flywheel is both larger and sits further aft than an M-block's flywheel. So the input shaft is too short to give good spline engagement and there is essentially no pilot bearing engagement. But the parts list shows a longer shaft, presumably for the small-block. The question is what using it would do.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Fordman7992
1973 - 1979 F-100 & Larger F-Series Trucks
5
Feb 3, 2016 08:22 AM
Gary Lewis
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
36
Aug 4, 2015 04:21 AM
Gary Lewis
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
25
May 7, 2012 02:03 PM
460man
Engine Swaps
7
Mar 31, 2006 05:32 PM
BBF250
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
6
Sep 24, 2005 08:34 PM




All times are GMT -5. The time now is 06:44 PM.

story-0
10 Ways Ford is LOSING to the Competition

Slideshow: 10 ways Ford is losing to the competition

By Joe Kucinski | 2026-06-15 09:52:01


VIEW MORE
story-1
Top 6 Best Deals Available on New Fords & Lincolns Right Now

Some great targets in today's expensive world.

By Brett Foote | 2026-06-15 09:35:19


VIEW MORE
story-2
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-3
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-4
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-5
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-6
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-7
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-8
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-9
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE