1967Mustang351M

Guys I need some help here! I bought an engine and a transmission thinking it was a 351 Cleveland. I just got some engine work done and it turned out to be a 351 Modified. I am wanting to put this engine in a 1967 Mustang Coupe. I have a few problems. The transmission is a T18. Not sure if it has 3 gears, 4 gears, or 5 gears. I am very new to engines and transmissions. Yes I am wet behind the ears. This is a new learning experience for me. Can someone please help me mock up what all I will need for this engine to be placed in my Mustang. I got the engine bores 60 over. I know I'm going to have to get new pistons, timing, cam bearings, etc.. the biggest question I have is will this transmission work with this car? It originally came out of an old ford truck. Just a general note I am looking for get about 500-600 horsepower and 400 or so torch. If this T18 will not work then what is a good Standard transmission I can use?? The T18 has a tall shifter so I know that is one problem. The mustang was a automatic and I'm wanting to convert it to a standard. If you respond back then please write as you are talking to an 8th grader because like I said I am new to this. Any help will be gratefully appreciated. Thank you!

dawson1112

You have a 351 stroked to a 400 thats all a 351m is.

As for that T18 transmission,, Im sure it will work and can be made to work in the car,, how ever that transmission is a farm truck transmission and first gear is going to be worthless in a mustang, second gear through 4th isnt gonna be a whole lot better either. That is of course unless your looking to pull stumps out of a field. I think that transmission has a 1st gear ratio of 6.32:1. They are great for pulling and farm work, and they are a good choice if your building a rock crawler, but not so much for a mustang. You would be much better off with a T5 heavy duty or z spec trans.

1967Mustang351M

Thanks! So you are saying when I bored it over 60 that it is a 400? Also I just looked on eBay and T5 are fairly cheap. Will just any T5 work or does it have to be for a Mustang? My dads a mechanic but lives states away. He is trying to persuade me to said the engine and tranny and he wants to find a 4.6 or something out of a salvaged car. What do you think the best route would be? Keep in mind the mustang is bare and is just a shell right now. It needs new or used everything.

barstowpo

Another thing to consider is exhaust. Headers are a bear on a Cleveland in a 67 and a 351M will be even worse. Same for modern modular motors. A 302 or 351W is an easy fit. Even a 390 came in that year from the factory. Consider the whole package when deciding what route to go. If a Mustang II suspension is an option you can remove the shock towers but again it is much more work.

1967Mustang351M

thanks guy! I'm just going to sale the engine and transmission. I think it's going to be a headache and I need to find something easier to deal with.

dawson1112

Sorry, I wrote that this morning musta been before coffee. The 351m is a destroked detuned 400 truck engine.. not alot of hp but a lot of low torque, coupled with that T18 it would probably eat the tires off the mustang but wouldn't go all that fast. Those engines have a long stroke and low compression. I had that set up in a f150 years ago,, it was good at pulling, but if I remember right it capped out of power at about 4500 RPM they just dont do well for muscle car applications. Youd get more enjoyment out of a little ole 5.0 in that car.

imp

Furthermore, don't M, and 400 engs. have the 429/460 Bellhousing pattern? Try to find a Bell to fit a T-5........I dunno. imp

dawson1112

CJ pony parts sells a bell for this.