accel retard box

Can anyone tell me where I can get or the part # for the retard box for the lt1 300+ for a 97.

Thanks

accel 375+ timing retard and window switch. summit has them part number is ACC-49375 i have one on my car it pretty cool for nitrous.

thanks'll check it out. I already have the msd window switch and would prefer to keep using it, but have to pull a few degrees for the 150 shot. Do you set yours up at a designated amount of timing to pull for nitrous?

they say rule of thumb is 2 degrees for every 50hp