There are some external differances between the 302 and 351. The 351W is taller and wider. There are a few things that will not cross over: Intake manifold, headers,
oil pan.
You can use the 302 distributor, but you must also use the 302
oil pump and
oil pump drive shaft.
Do some research on using the Z heads, as (I think) they have a raised exhaust port and you might have trouble fitting the exhaust.