While my heads are off, Stage V iron, I’m wondering if it worth filling the crossovers in the exhaust ports. I know it was done a lot in the past. Is it effective? Anyone ever test it?

Thanks
Bill

1968 Road Runner 383 727 3.91 8 3/4 3520 with driver 11.04 @ 124.26 with 1.67 60’
Done on G70-14 redlines thru factory manifolds New quickest ever 383 build in FAST.
10:1 451” replaced with 14:1 499”.