I think to much or to little timing can cause extra heat to be ade in the motor, the sweet spot is the best Test, test and test until you find it. Don't assume what yours is with YOUR timing light on YOUR motor is the same (identical to within 1/2 degree) as every one else's
This ^^^^^^^
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