i am taking everything from lingenfelter because they are the most expesive that way you will have a better idea of what it is going to cost
not everything is the same but similar
427 c5-r motor 26,000 (base) 550+ rwhp depending on options (not a 572)
LPE HD 3.5" aluminum driveshaft $299.95
Fast composite intake manifold $874.00
90 mm throttle body $499.95
then you have at least 2,500 in suspension work
clutch 1800
rearend 2400
fuel system 800
wheels and tires 3000
brembos 3000
other misc stuff 1000
add to the list whatever but that will give you some what of an idea if you want a big block around 40 grand in parts not including labor. there are other much cheaper ways to make power but you wanted some big block numbers.
the 427 price does include all labor,tunning, a borla exhaust and lid