Yes a 429 would fit into a 1969-1970 Ford Mustang without no engine compartment mods
No, the Boos 429 will need mods for the engine to fit in the 1998 Mustang.
They may fit with spacers, but they will not be a direct swap. You also have to consider the center bore of the wheel - they may be different.
1969
There is no horn relay on a 1970 mustang
The wheelbase for a 1970 Ford Mustang is ( 108.0 inches )
It doesn't drop right in. It will take some fitting but can get it to go.
429 cubic inches (7.0 liters)
yes
Will a 1998 3.8 mustang engine fit in a 2000 Mustang 3.8 engine?
Mustang wheels will fit on a 2000 Crown Vic depending on the year of the Mustang.
The mufflers of a 2012 V8 Mustang cannot fit a V6 Mustang of the same year.
the 427 was the largest engine the mustang was made to fit