The original throttle cable from your 2S is just too quick and isn't going to reach the linkage for your ITB’s. I had a take a look at some old Toyotas at the wrecking garden and found one that would in good shape from the 1989 SV21 Camry. This design https://4a-ge-engine-for-sale43108.ampblogs.com/the-greatest-guide-to-blacktop-4age-75983466