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Repowering Mustang |
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SugarbushBoater 
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Joined: May-28-2020 Location: Warren, Vermont Status: Offline Points: 11 |
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 Topic: Repowering MustangPosted: June-02-2020 at 7:40pm |
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Hello - I am looking at a 1966 Mustang as a project. The heads were removed from the motor, motor (Interceptor) is seized. How possible is rebuilding? I have done engine work. but more likely I would like to repower with something newer and remanufactured. But I don't see these motors out there. There are lots of just later - post Y block era.
What's the best approach here? Thanks! |
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Gary S
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Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Posted: June-02-2020 at 8:08pm |
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IMOH the engine is the least of your concern
 How are the stringers, the gelcoat, all the hardware there?, seat frames? How about the windshield- all there? Glass or plastic? Correct Craft trailer? Finally how much is being asked for it .......
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illiniball2000
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Joined: June-27-2014 Location: Elgin,IL Status: Offline Points: 386 |
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Posted: June-02-2020 at 8:14pm |
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If you decide to go with it I have a 302 that was a new long block from Summit Racing that is only a few years old with a DUI installed.
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Beer is my friend
87 Dominique Had 67 Starflite |
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zwoobah
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Joined: September-13-2018 Location: Providence RI Status: Offline Points: 308 |
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Posted: June-02-2020 at 8:50pm |
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You can often free up a motor by pouring aerokroil, marvel mystery oil, etc in the cylinders and letting it sit, then turning the crank with a giant breaker bar. Check the dipstick for oil first. If you see a lot of water in the oil you'll need to yank the motor. If the oil is clean you might get lucky breaking it free and running it. Take a close look at the cylinders after you get it freed up.
For replacement you can look at a 260, 289, 302. A 351 will fit if you cut and widen the engine cover. This boat would have had a reverse rotation engine originally and you should replace it with another reverse rotation. If you pull the stock motor don't junk it, there are a few specific reverse rotation parts you may need for the replacement. |
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1968 Mustang 16 - 351W powered
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SugarbushBoater
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Joined: May-28-2020 Location: Warren, Vermont Status: Offline Points: 11 |
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Posted: June-02-2020 at 10:19pm |
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Thanks for the comments so far. yes, I know about all the other things to check out. Stringers certainly important. And, I have a lot of auto engine experience. I know you can at times get motors freed up. but then you need to worry about the cylinders, rings, etc. not to mention what's happened with the bearings while it's been sitting. My thought is get a motor in it, enjoy it. rebuilt the original or not depending on what I find. I've rebuilt auto engines before.
of the 260, 289, etc. will they all mate with the velvetglide trans? is it pretty standard crank bolt pattern? |
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Gary S
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Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Posted: June-02-2020 at 10:28pm |
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Bellhousing would be the concern. A 260 requires a 5 bolt bellhousing. 289,302,351 uses the more common 6 bolt. Chances of finding a 260 easily and in good shape is going to be difficult. A 260 may even be difficult to source parts as well. Brians 302 would certainly be worth looking into.
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SugarbushBoater
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Joined: May-28-2020 Location: Warren, Vermont Status: Offline Points: 11 |
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Posted: June-03-2020 at 8:36am |
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Thanks, that's a really good point! I didn't know the bell housings would likely be different, that's what I've been wondering. Yes, Brian's 302 sounds good. Wish it were closer to me!
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illiniball2000
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Joined: June-27-2014 Location: Elgin,IL Status: Offline Points: 386 |
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Posted: June-03-2020 at 9:15am |
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I’m sure we could figure out a way to ship it if you were interested.
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Beer is my friend
87 Dominique Had 67 Starflite |
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MrMcD
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Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3750 |
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Posted: June-03-2020 at 4:54pm |
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Unless originality is your #1 concern I would scrap the 260 and move to the 289/302/351 platform. Parts would be easier to find in the future and all of them offer more power. You would need to deal with the bell housing issue but once done you would have the more modern set up. I freed up my 327 that had been parked since 1978. It took time, a lot of soaking, had to pull the heads, heat the pistons and soaked more. I used the 50/50 mix of acetone and tranny fluid. It worked. The engine turns over freely. Mine will still need a rebuild but even that is much easier if you can rotate your engine. Yours may free up and be fine. Many have in the past.
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SugarbushBoater
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Joined: May-28-2020 Location: Warren, Vermont Status: Offline Points: 11 |
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Posted: June-08-2020 at 5:27pm |
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Thanks everyone. I'm thinking this boat needs more work than I want to put in it right now. I agree, repower with newer platform makes a lot more sense!
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