The engine will bolt in with the factory SB or BB mounts.
The starter will bolt to the block same as a regular engine.... you only need the belle housing mounted starter if you are bolting it to the c50 c60 truck trans.
The alternator bracket may need slotted to fit the taller block.
Some large truck harmonic balancers had wider belts. This will require a standard car or pickup balancer & pulleys from a 396/427..... not the 454 as it is counterweighted.
my Hedman headers fit well.
I have the hydroboost brakes & they fit with the tall Moroso valve covers, not sure how the clearance is on a vacuum assisted brake unit.
Hope this helps.