I have an ECP 26" core in my 68 Charger 512ci with AC & I am in South east Texas, in 107 outside temp with AC on car runs 185ish all day long, I had a 4core Champion that did not work so well in the same car.
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
