Engine swap
Thread Starter
|
Junior User
Joined: Oct 2004
Posts: 63
Likes: 0
From: Zanesville,Ohio
Engine swap
The engine in my 1981 F150 302 aod tranny is getting tired but worse yet is leaking oil everywere.
I am planning on replacing it but I am thinking of putting in a 351 instead of another 302.
How difficult will it be to replace the 302 with a 351,will any parts need to be changed or replaced for the 351,and is the difference in power between the 302 and 351 really worth it?
Jeff
I am planning on replacing it but I am thinking of putting in a 351 instead of another 302.
How difficult will it be to replace the 302 with a 351,will any parts need to be changed or replaced for the 351,and is the difference in power between the 302 and 351 really worth it?
Jeff
Lead Driver
Joined: Dec 2002
Posts: 5,491
Likes: 16
From: Kuna ID
The 351 will practically bolt right in, it will bolt to your tranny and your motor mounts, but your exhaust will need to be modified. I believe your exhaust manifolds will fit the 351, but due to the taller deck height, they will be a little further apart, requireing a new Y-pipe. You will need a complete 351, from intake to oil pan and the accessory mounting brackets, as these are different from a 302 to 351. It would be much simpler to rebuild or replace your current 302, but it you have the time and money, you can have more fun with a 351. 
Thread Starter
|
Junior User
Joined: Oct 2004
Posts: 63
Likes: 0
From: Zanesville,Ohio
Originally Posted by Sycostang67
The 351 will practically bolt right in, it will bolt to your tranny and your motor mounts, but your exhaust will need to be modified. I believe your exhaust manifolds will fit the 351, but due to the taller deck height, they will be a little further apart, requireing a new Y-pipe. You will need a complete 351, from intake to oil pan and the accessory mounting brackets, as these are different from a 302 to 351. It would be much simpler to rebuild or replace your current 302, but it you have the time and money, you can have more fun with a 351.
