k5ontherocks

i am installing a 2003 5.3 into my 1970 k5.
i am using the returnless system(stock) with a vette
filter(return/reg. built in)if needed,read on.....
my question is,can i use a stock fuel tank from a 2003 tahoe also.
i was thinking this would make install easier than buying a custom tank
or upgrading my stock tank.(i can get a new tank for free)

is this a worthwile swap?fabbing mounts and geting it to fit
is no issue.its just wether or not i should go this route?
any input is greatly appreciated
thanks