3:54 vs 4:10 with a low deck 499

Also, check out the compression height differences between the 470 and 500 CID engines.

Stroker Kits-440 Source

470 = 1.480 compression height, rod length is 6.535"
vs
500 = 1.222 compression height, rod length is 6.760"

Do you need the better rod ratio enough?

That's a 0.258" difference, just a hair over a quarter inch. Is the bottom ring unsupported? What kind of piston rock will you get? Do you need extra long skirts to help make up? What kind of balancing needs done? (The balancing is probably a wash, but that's just a guess on my part).