66 Mustang, your thinking of the AU T-Series Falcon, which used a stroker Windsor, but was 5.6L.
The modular V8s have the same V angle as the windsors (90 degree), and id put money on the 5.4 and 4.6 DOHCs being able to fit in an E-Series engine bay without any kind major mods. Im pretty sure the AU/BA didnt require any engine bay modification to fit the 5.4s, but from what I understand theres as little as 3mm of clearance between the heads and inner guard with the DOHC 5.4.....
1993 ED XR6 M5 (1 of 329)
Turbo on the way!!
1993 EBII Fairmont (Now wrecking, PM if you want any parts)
1988 Nissan R31 Skyline