300/400 swap???
Thread Starter
|
New User
Joined: Aug 2013
Posts: 2
Likes: 0
300/400 swap???
I want to put a 300 into a f150 that has a 400 in it. The truck is a 76. The 300 is from a 78. How complicated is this swap gonna be. Can I use the tranny that's in the truck? The 400 is attached to a 4x4 tranny and I was hoping to use it. Is there a possibility that it will just bolt in...aside from the mounts.
Postmaster
Joined: Mar 2005
Posts: 2,949
Likes: 6
From: Earth
A 400 uses the big block bolt pattern on the bell, 300 the SBF pattern. Is the current tranny a four speed with a granny gear? If so it's probably a T-18 - which might just require a bell change depending on the shaft length.
You will probably need new perches on the frame as well as mounts.
You will probably need new perches on the frame as well as mounts.
Lead Driver
Joined: Mar 2008
Posts: 7,195
Likes: 387
From: Near Los Angeles
I swapped from a 390 to a 300. I used the same towers, moved one hole forward on the frame, but different m.mounts. You'll also need all the attachments: p/s pump and mount, starter, alt, etc. The trans/or bell needs to changed. I needed to have a shop move the radiator hose fittings.
Lead Driver
Joined: Dec 2000
Posts: 6,298
Likes: 47
From: South central, Minnesota
The 360/390 & 240/300 use the same mount perches.
The 400 uses the same mount perches as a 302/351W.
So swapping a 300 into a 400 truck will require swapping out the motor mount frame perches & motor mounts.
And like BaronVonAutomatc mentioned if you have a manual transmission you will need the 300/SBF V8 bell housing. If you have an automatic then you will need to swap transmissions.
Then you will also have all the little stuff to deal with too. Like the wiring, throttle linkage/cable, kick down linkage ( if you have an automatic transmission, the exhaust system, etc.
The 400 uses the same mount perches as a 302/351W.
So swapping a 300 into a 400 truck will require swapping out the motor mount frame perches & motor mounts.
And like BaronVonAutomatc mentioned if you have a manual transmission you will need the 300/SBF V8 bell housing. If you have an automatic then you will need to swap transmissions.
Then you will also have all the little stuff to deal with too. Like the wiring, throttle linkage/cable, kick down linkage ( if you have an automatic transmission, the exhaust system, etc.
Thread
Thread Starter
Forum
Replies
Last Post
gittinwidit
1973 - 1979 F-100 & Larger F-Series Trucks
7
May 27, 2016 09:48 PM
73FordF100
1973 - 1979 F-100 & Larger F-Series Trucks
17
Jul 25, 2011 03:36 PM
ygoldsberry
1973 - 1979 F-100 & Larger F-Series Trucks
17
Jul 5, 2008 09:27 PM
