I am buying a 429 to put in my 69 fastback.
Any cool things to know about it and how cold I properly invest my money into rebuilding it for the best bang for my buck?

 

The heads of the passenger car 429 were awful. A pair of FRPP Cobra Jet heads will make a world of difference.

 

Agreed, headers are fun too. I would stick with a dual plane intake and a cam no bigger than 240@.050. Something in the 234 range would wake it up nice without being a pain with low vacuum.

 

I had a set of built 429 police interceptor heads on a built 460 block when I was a teenager and it was the cats ***. I would do it again if I could.
Lynn

 

why are you going with a 429? originality? perceived big performance?

 

I am going with the 429 because the guy who sold me the car will sell it to me for 300 in put together condition.

 

Good reason. There are aftermarket motor mounts and shorty headers that make the 429 swap a snap in 67-70 Mustangs. After that it's easy.

 

The $300 engine may wind up coasting you a couple of grand new heads and everything to fit the trans to it. Just check it all out before you think its cheep H.P

 

The 429 is crazy wide. You will need to cut shock towers to get them to fit. It can be done...obviously...1969 Boss429. I am not sure accessories will fit (i.e. PS and AC). I am pretty sure headers are out of the question. Jon Kasse is the man on 429s. His heads are the industry leader. He won the Engine Master Challenge this year and is always at the top of the class.

Just remember that with more torque comes more money spent to fix parts that you break.

 

No, you don't. The passenger 429 will fit between the 67-70 towers. The BOSS 429 required special towers because of the hemi heads.