Tfs 11r on 289 with stock heads?

[OttawaFFRer]

my hope and dream of using worked iron heads on my 289 are out the window.

The tfs 11r has a similar combustion chamber.

I see there can be issues with piston clearance.

Your experience is appreciated, can I do it with stock flat tops with valve reliefs at stock position?

edit to include cam specs:
int exh
valve adjustment .018 .020
gross valve lift .529 .542
dur @ .0.0 tappet life 271 279

valve timing @ .050 open close
int: 12 BTDC 44 ABDC
exh: 47 BBDC 15 ATDC

@106.0 intake centerline

int exh
duration @ .050 235.00 242.00
lobe lift .3310 .3390
lobe separation 106

Thanks
Victor