We are planning to replace my dad's 300 I-6 in his Bronco, with a '73 351 windsor. Will we have to change (or modify) the mount towers?

 

When I swapped from a 300 to a 351 on mine, I had to get the engine mounts for it. They bolted right up to the frame on mine, and fit perfectly. But that was an 81 truck with an 86 engine. I'm not sure if the 73 mounts are different thant the 80's though.

 

What year is your dads truck,if your going to an eighties truck the ,the 73 frame tower will not work.you need towers from 80 to atleast 86 the engine mounts havent changed ,but not sure.