[PaulS]

The 429 engine (whether it is the CJ or not) is not as wide as the 427 SOHC that was put in the 67.....

[4 stvmcqn]

I beleive you will need to replace the front sway bar to accomodate a big block.

[gtjoe]

The 427 SOHC was NOT put in the Mustang by either the factory or Shelby. Although the non SOHC 427 was listed as an option for Mustang, NONE were ever put in from the factory. The SOHC is 32" wide. the Boss 9 is 30" wide and the FE is 27". SOHC motors were put in by "tuners" and racers with modifications to the shock towers or removing them altogether.

[PaulS]

Originally Posted by gtjoe

The 427 SOHC was NOT put in the Mustang by either the factory or Shelby. Although the non SOHC 427 was listed as an option for Mustang, NONE were ever put in from the factory. The SOHC is 32" wide. the Boss 9 is 30" wide and the FE is 27". SOHC motors were put in by "tuners" and racers with modifications to the shock towers or removing them altogether.

My bad - you are correct. It was NOT a factory offering - just the 427 and 428 were offered in the 67 - 68 Mustangs.
According to my info the 429/460 is 30" long and 27" wide. I don't have any dimension info on the FE series engines.

[05SCGTPONY]

Have you done any research into suppliers for the headers for this application? I have a 67 that had a 427 in it but have since installed a Boss 351. Hooker Headers had a set of headers for this app. They were more expensive than others but worked and were engineered very well. Good luck with the swap!