Retro sound radio advice

[frenchy51]

I just tried to install a Retro Sound radio in my '72 C10. Install was straight forward-put 2 4 1/2" speakers in the dash and 2 6 1/2's in the doors. Wired it up and it sounded great until I fired up the engine. It would cut out kind of like a skip. Called Retro and they said it was RF interference and to cover the radio with tin foil. Did that and didn't help so pulled out radio and set it on the seat with jumper wires to get it farther from the distributor and it still didn't work well. Called Retro again and they're sending a "relocation" kit (no charge) to mount the receiver (?) under the seat-they said it would cure the RF interference but I'm skeptical- Any body else had this problem? I'm thinking the radio is defective, but Retro says no.....