LA Block/Magnum Heads

Does a roller cam in a LA block incure about $1,000 of expense over a flat tappet?

Cam specs are 288/292 .501/.513 lift. 230/[email protected]

9:1 compression yields 380+HP 410 TQ
10:1 yields 395+HP 435 TQ
4"stroke 9:1 magnum rt heads returns 435+HP 457tq