Very cool!! I was doing the same this morning. I'm working on a track where I need a tone that is "surfy but distorted". I had to dig deep, but remembered the Dead Kennedy's had a tone similar to that.
After going through my guitars, it has come down to an 80s Ibanez RG560 that I caught on fire and is loaded with real 1964 Strat pickups and a 1960 PAF. Pic:
In my Helix I managed to create a tone using the Silvertone 1464 amp model and my Marshall 1966 2x12 Impulse Responses. My first block is a gain block set to reduce the output from the guitar by 4.9 db. Then I split the path with an A/B split. The A path has a harmonic tremolo pedal to the amp. The B path got a 63 Reverb tank feeding the preamp of a Supro amp before being mixed back with the A path into the Silvertone.
Using the Supro preamp, I am able to get a cool drive that is more natural feeling than just dropping a pedal in there. Also, when you drop your drive to a parallel input path, you can saturate while retaining the "natural" amp sound.
Behind the Silvertone I have 2 IRs. One is my old 1966 cab close mic'd with a 57 and a 121. The second is the 1966 room mic'd with a U87. Each of these is on a separate path. In front of the close mic'd cab In running a Space Echo set to 366ms and a 16% mix. Behind the room cab is a Chamber reverb set to an 11% mix.
Each cab is sent to its own output. Hard R for the room cab, hard L for the close cab. Using either the neck or bridge pickup I get a very different type of a response. Both are surfy but driven, yet clear and tight.
Tonight I'll start working through the track. I'll cut a couple of parts and send a proof to the producer and see if I'm heading in the right direction.
Good luck on your work. I'm looking forward to more reports and pics!!