Yes, It will fit, but the 351W sits 1 1/2" inches higher than a 289/302 engine. It has a taller deck. You need to use a '65-'66 Shelby Hood Scoop with a hole cut in the hood to clear the engine, aircleaner, etc.,or other to make it work, though there are a few out there that say it will work with a stock hood, but I have yet to see that done, or I should say that I would like to see a pic of someone that has done it.
Melbourne, FL (Formerly from Long Island, NY!)
1965 Mustang Convertible 200cid I6, 3spd Manual (Soon to be swapped for a '65 Date Coded C4!)
1966 Mustang Sprint 200 Registry Owner/Moderator
1966 Mustang Sprint 200 Convertible 200cid I6, C4 Auto
2007 Mustang V6 Convertible w/ Pony Package
Getting Ready for the 2020 Melbourne, FL MCA Nationals!