Is there anyone out there who has done the 4.6 or 5.4 engine swap into the 71-73 body? I know on the pre 71's lots of shock tower surgery is required to accomplish the swap. Is this the case for the big boddied 71-73?
Pushrod Power: To the best of my knowledge the 71-73 never came with a 460. The only engine options listed in any of my reference guides; 250 (6c), 302, 351, BOSS 351, and the rare 429CJ. I had heard that the 71-73s were designed with the BOSS 429 in mind but never got the engine. I had figured that if a 429 fit with no mods that the new mod motors would be no issue. I wanted to verify that before dropping any money on one. I am building a street/open track car and don't want all the extra weight of a big block up front. I am sure a pushrod would be cheaper in the long run to build from the ground up but am still kicking around the possibility of efi and eventually a turbo. Just checking all my options. Thanks for the input though.
OK. Now that we have established that the 460 will fit...Can anyone compare the dimensions of the 460 to that of the 4.6 or 5.4s?
the 71-73 stangs have plenty of room under the hood for a 5.4 mod motor if you choose to go that route.
Stangdreamin: Thank you. Those were exactly the specs I was needing to make my decision, especially since it would appear that no one has gone down this path; at least that I can find.
i will say however that i have been seriously considering doing this very thing to a big body mustang or cougar vert for my daughter at some point when she gets up to driving age so she'll have a nice cool old car with a modern dependable drivetrain that she can drive without having to worry about something breaking down
hossdoc said:I have given you the benefit of the doubt on this point. But before I drop a dime on a mod motor I require proof that it will fit.
hossdoc, if you were looking to swap a 460 into your big body, it would be easy since it is a front sump pan engine. the mod motor is a rear sump pan engine, and you will need to make many changes, including modifying the crossmember, moving steering components, etc.
… including modifying the crossmember, …