I've always been a fan of the old style mustangs since i was 14, and saw one at a car show. Im now 21 and looking for a good project, and i've concluded i like the 68-69 fastbacks the most. I have a 'modifying personality' i've gotta mod every vehicle i touch, so i know this project car wont turn into a factory show car. With that said im kicking some engine ideas around and would like some feedback. I want to build my engine from scratch, im just not sure what to start with. Will a 429 fit without major mods? i know ford put the 429 engine into the 69-70 boss but i've been told the frame had to be reworked in order for it to fit. I dont have a problem welding/modifying the frame, but im curious how much work would have to be done. Im also kicking the idea of building a 351, this is somewhat more appealing to me due to the fact that there will be less if any fitment issues, and there's tons of parts available.

Anways, this forum looks like a good place to gain some info.


Nick

 

The 67/68 and 69/70 fastbacks were availible with everything from a 200 CI six to a 428 FE big block. As yo have mentioned, the 69/70 was also available with the Boss 429, not to be confused with the standard 429. The Boss heads were the reason for the need to rework the shock towers. Aftermarket chassis mounts are available to bolt the 429/460 into 67-70 mustangs. The 351w is a very popular choice for the reasons you mentioned. I'm partial to FE's but they can get a bit pricy. A Cleveland is a great choice as is a stroked 302. And then there are the "Street Bosses" 302/351. I don't think there is a wrong choice, you just have to decide where you want to go with the project and how deep your pockets are.

 

Yeah, "how deep your pockets are" is the driving force here. For me and my shallow pockets, if I were building a runner for the street and the track, I'd opt for the 67/68 fastback with the 351 Cleveland. The parts for the 69 seem quite pricey due to non-availability in many cases. That 351 C can be built to keep up with most 429's without too many mods.

 

hey man i can get you a 428 cobra jet from a friend of mine for about 14k. you say that's exspensive but you have to consider how rare they are, most would go for about 25k. Let me know. but plz hurry this friend of mine is always selling/buying/modding cars so he may have a plan for the engine, i really don't know. you can also email me at johnwsix@bellsouth.net thanks

 

If you want cubic inches, the best bang for the buck is a stroked 351W with good heads and roller cam. Can go way past 400 cid.

 

I like the 289/302. they have to be the fastest reving motors. To make the fast you have to spent some money on them[&o]. In the 1/8 the can beat most big blocks. For the street, they are the best.

 

I think you should go with the flow here. the consensus is the 351w. I agree you'll get the most bang for the buck. If you pockets are really deep go with the boss9, if you can find one.

 

yeah if i were u, i'd just get a windsor and stroke it, that what i did with mine i got a 351w and stroked it to a 408 stroker i just installed it in my 69 coupe ill let u guys know what i get on hp etc...but overall 302 still can beat the big blocks out there so i mean there are alot of hp parts for small blocks so i mean u can get the same amount of hp the big blocks are getting. the site i got my stroker is at coasthigh.com they sell some great kits, to bad there prices are going up. but good luck on your stang