The last owner installed the hemi and drove it about 75 miles said it scared him so he parked it for about 9 years ( he was 75 at the time) said he started it every couple of weeks to hear it run. this is a mopar crate motor so i think it is a mopar manifold single 4, 850 CFM idles great also...
here's what I have, just got a 70 cuda with a 472 hemi auto tranny it starts good runs good idles good burns the tires good until i hit wot then it backfires and runs terrible until I let off runs good right through 3/4 throttle it has a 4150 holley vacum secondaries jets are 80 front 82 back...