Best motor for 69 Barracuda

actually 383/400/440/426hemi dont require any "body" mods but do require significant chassis mods in order to get them into the engine bay. k-frame mods/adapters, headers usually, different radiator etc. not impossible but takes time/money.

no body mods required, especially the 383/400 if you use a dual plane lower profile intake you dont even need to modify your hood.