largest possible engine in 64-66?

[ramnaraina]

Hi, I intend slotting a 351 cleveland from a Fairlane 500 into my 68 coupe but are concerned about the following:
1. Would it fit with the original cast iron headers.
2. Could I use the original 289 engine mounting brackets. (They however look different).
3. Once installed can I swap the 2 barrel with my 4 barrel (would the hood close?).
4. How difficult would it be to change spark plugs?

Thanks in advance.

Jeffery
jeffery@iafrica.com