The Ford Barn

sactopv · 08-27-2022, 03:21 PM

I have stock 1940 Fordor which I have owned since 1968. Haven't driven in 30+ yrs.

want to install hopped up 1951 Merc flathead in it and mate to the column shift 1940 3 speed.
what flywheel and pressure plate do I use? will the ones off the 1940 flathead work? Waht bellhousing and starter plate fits this application?
Thanks for your help

Ronnie · 08-27-2022, 04:12 PM

You can only use an 8ba flywheel. Others will chime in about your other questions.

R

tubman · 08-27-2022, 04:19 PM

By "8BA" do you mean specifically a '49-'51 Ford flywheel or just a generic post '48 flywheel. I believe the proper combination is the Merc flywheel and pressure plate and the appropriate disc (I has been 30 years since I did this; I do know it can be done mixing and matching stock parts.)

19Fordy · 08-27-2022, 05:47 PM

sactopv: Read all this:
https://www.google.com/search?q=inst...hrome&ie=UTF-8

You need to use the 1949-51 Merc flywheel, pressure plate and full bell housing with the matching starter plate. You can use the stock 40 throwout bearing. I have an 8BA/8CM in my 40 with the stock 40 transmission. You also need the 49-51 Merc rear sump oil pan or an early Ford pick up rear sump oil pan.
Here's more:
https://www.fordbarn.com/forum/showt...ll+8ba+36+ford
You must read all of this thread.
https://www.fordbarn.com/forum/showt...gine+1940+ford

rotorwrench · 08-28-2022, 10:37 AM

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The 49 through early 1951 all used the same 1 3/8" 10-spline as the early Ford. Sometime around February of 1951, the change to the 1-inch 10-spline started along with the big cast iron bell housing.

A person needs the pressed steel half bell of the earlier 1949-E51 Mercury cars. The 49-E51 Borg & Beck clutch can be used or a Ford flywheel can be re-drilled for a Long type clutch of either the 9-inch or 10-inch variety for earlt Fords with the 1 3/8" 10-spline.

08-27-2022, 03:21 PM	#1
sactopv Junior Member Join Date: Aug 2011 Posts: 4	51 Merc into 1940 fordor flywheel clutch questiond I have stock 1940 Fordor which I have owned since 1968. Haven't driven in 30+ yrs. want to install hopped up 1951 Merc flathead in it and mate to the column shift 1940 3 speed. what flywheel and pressure plate do I use? will the ones off the 1940 flathead work? Waht bellhousing and starter plate fits this application? Thanks for your help

08-27-2022, 04:12 PM	#2
Ronnie Senior Member Join Date: May 2010 Location: Canada Where it snows Posts: 2,058	Re: 51 Merc into 1940 fordor flywheel clutch questiond You can only use an 8ba flywheel. Others will chime in about your other questions. R

08-27-2022, 04:19 PM	#3
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 10,319	Re: 51 Merc into 1940 fordor flywheel clutch questiond By "8BA" do you mean specifically a '49-'51 Ford flywheel or just a generic post '48 flywheel. I believe the proper combination is the Merc flywheel and pressure plate and the appropriate disc (I has been 30 years since I did this; I do know it can be done mixing and matching stock parts.)

08-27-2022, 05:47 PM	#4
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 10,950	Re: 51 Merc into 1940 fordor flywheel clutch questiond sactopv: Read all this: https://www.google.com/search?q=inst...hrome&ie=UTF-8 You need to use the 1949-51 Merc flywheel, pressure plate and full bell housing with the matching starter plate. You can use the stock 40 throwout bearing. I have an 8BA/8CM in my 40 with the stock 40 transmission. You also need the 49-51 Merc rear sump oil pan or an early Ford pick up rear sump oil pan. Here's more: https://www.fordbarn.com/forum/showt...ll+8ba+36+ford You must read all of this thread. https://www.fordbarn.com/forum/showt...gine+1940+ford Last edited by 19Fordy; 08-27-2022 at 05:57 PM.

08-28-2022, 10:37 AM	#5
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,436	Re: 51 Merc into 1940 fordor flywheel clutch questiond Sponsored Links (Register now to hide all advertisements) The 49 through early 1951 all used the same 1 3/8" 10-spline as the early Ford. Sometime around February of 1951, the change to the 1-inch 10-spline started along with the big cast iron bell housing. A person needs the pressed steel half bell of the earlier 1949-E51 Mercury cars. The 49-E51 Borg & Beck clutch can be used or a Ford flywheel can be re-drilled for a Long type clutch of either the 9-inch or 10-inch variety for earlt Fords with the 1 3/8" 10-spline.