Very early 60's engines, like 60, 61, 62, etc. will bolt in. Anything 63 and up won't- - - - -those will be 194, 230, 250, or 292 cubic inch engines, with the same bellhousing shape as a V8. 216, 235, and 261 engines will be a bolt-in swap, or pretty close, at least.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!