1990 Mustang 5.0 Engine in 68 Cougar

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CougNutt1782
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1990 Mustang 5.0 Engine in 68 Cougar

#1

Post by CougNutt1782 » 17 May 2019, 02:58

Going to purchase a 68 XR7 with a 1990 5.0 engine installed. Sounds great. Just checking if anyone has any experience with this combination. Not a gear head. Some details on this motor would help. Really excited to purchase my first Cougar. Wanted one as long as I can remember. Any feed back would help. :D :D :D

CougNutt1782
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Re: 1990 Mustang 5.0 Engine in 68 Cougar

#2

Post by CougNutt1782 » 17 May 2019, 03:11

Motor kk
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Royce
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Re: 1990 Mustang 5.0 Engine in 68 Cougar

#3

Post by Royce » 17 May 2019, 04:25

There's not a great deal of difference between a '68 302 and a 1990 5.0 other than the cylinder head technology is better and the 1990 engines came with a roller cam which is also a good thing. Yours seems to have a carburetor which is not typical of the 1990 engine. Should be a good thing overall.
1968 GT-E XR-7 W code 427 Augusta Green / Saddle
1968 XR-7 R code 428CJ Ram Air Red / Black
1910 Model T Ford Touring Red / Black
1914 Model T Touring Maroon / Black
1915 Model T Ford Touring Black / Black
1917 Model T Ford Torpedo Runabout Green / Black
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CougNutt1782
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Re: 1990 Mustang 5.0 Engine in 68 Cougar

#4

Post by CougNutt1782 » 17 May 2019, 05:04

Royce wrote:
17 May 2019, 04:25
There's not a great deal of difference between a '68 302 and a 1990 5.0 other than the cylinder head technology is better and the 1990 engines came with a roller cam which is also a good thing. Yours seems to have a carburetor which is not typical of the 1990 engine. Should be a good thing overall.
Thanks!

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wish
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Re: 1990 Mustang 5.0 Engine in 68 Cougar

#5

Post by wish » 17 May 2019, 05:58

Watch the firing order. The HO Mustangs use the 351W firing order if they have the stock cam in them. I would guess that's a 68 302 intake put back on it because all of the Mustang 5.0s from 86 on were fuel injected. I believe they also used a different harmonic balancer so you may want to check and be sure you have the right one. The 68 should have 3 bolts holding the pulley on while the 91 should have 4 if I'm remembering correctly.

The little bit of exhaust manifold showing looks like the stock Mustang exhaust rather than the Cougar manifolds.

As Royce said you shouldn't notice a whole lot of differences since it seems like they put the stock accessories and stuff back on it. The balancer and firing orders would be the big things to watch out for if you have troubles such as poor performance or odd vibrations.
Just my $.02
wish
69 Cougar, That 70s Truck, 84 Cherokee Chief 2dr, 88 Grand Wagoneer, 95 Grand Cherokee,96 Mustang

DieselD
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Re: 1990 Mustang 5.0 Engine in 68 Cougar

#6

Post by DieselD » 17 May 2019, 08:42

There are differences between the two but nothing really negative. Just need to know what they are when your buying parts as some stuff is specific to the newer motors.

If she is running well and the car is what you want pull the trigger, you will not be disappointed!
1968 Standard, 302 2v, 3 speed.

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cj750
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Re: 1990 Mustang 5.0 Engine in 68 Cougar

#7

Post by cj750 » 21 May 2019, 09:38

Looks like they are running an older style distributor. If so, one critical thing to verify is that the drive gear was replaced with a newer style compatible with the roller cam in the '90 engine. Otherwise, the original cast iron distributor gear will be worn away by the steel cam gear, sending tiny metal bits through the engine in the process. If the swap was done by a halfway knowledgeable shop it was almost certainly addressed. But I'd ask anyway.

Bottom line, they're well built, good running engines. So long as the swap was done in a competent manner, it should give many miles of dependable service.
Jay
CCOA #2323

Every post I make comes with a request for corrections. I'm here to learn.

1969 Cougar Eliminator 351 4V, yellow
1970 Cougar Eliminator 428SCJ, black

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