The ramp on a solid is different than a hydro, the seat duration would be much more & depending on the cam the valves would not be closed when they should.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5