Thread: swap 289 with 351 w

Tweet

hey wats goin on fellas. i got a 67 cougar and im swapping the original 289 with a 351 w. Would parts from my 289 like a dostributor, starter, and alt. would work. If you have any tips or advice it would be greatly appreciated. thanks.

Distributor won't work, too short for the 351. There's a change in the starters in mid'82, I believe, and the Windsor ring gear has a balance weight, you have to use the one for that engine so depending on what tranny you use, there might be a problem there. Best to use the trans that is on the 351. The C-4 Cougar tranny isn't the best one for a Windsor anyway.

Never enough info, I'm curious what year the 351w is. 69 is the best year, the heads have the big Valves. If you have a later 351w with small the small valves and big ports,swap the heads off your 289 with them and it will raise your compression to about 10 to 1 from about 8 to 1. This will take you from around 150 Hp to about 275 Hp big differance. Give us some of the ID Numbers from above the starters and off the heads and we came help you out.


~ Vegas ~

Bumping the compression from 8.0 to 10.0 isn't going to give you 125 HP! My '69 Hipo is rated at 270 with 9.5 CR big ports and hotter cam, along with other differences. Grind the thermactor bumps out of the 351 heads, and if you want higher compression, buy some pistons. The 289 heads have tiny ports.

IT WILL BE CLOSE MAYBE NOT EXACT!!! And even with the small valves the differance is night and day. And these facts are strait out of my ford book. And yes I have done this swap, my self.
And my 67 mustang went from not being able to turn the tires over to roasting the tires for two blocks. Yes big valves are nice
but what he has will work fine, and save on gas and dollers on new valves or heads. I've been in to fords for the last 25 years and I know how good those closed chamber 52cc heads work.
Here's a photo of the Ford head I'm working on now for my new Engine.

~ Vegas ~


Try this.
http://www.clubhotrod.com/forums/sho...threadid=13829