[89IROC&RS]

um, is it TBI or carb'd??? its not both. looks carbed to me.

anyway, i agree with these guys, you dont know enough about the engine you are working with for us to start throwing out possible upgrades, we dont know what youre working with so we dont know how to upgrade it.

also with cams, high lift usually makes power, but too much will smack your valves into your pistons causing serious damage, and too much durration will create valve overlap which will bleed off a load of low end power in favor of extreme high end power. so unless its a race motor, id stick with a performance street/strip cam. comp cams has a 1-800 number to help choose the perfect cam for your application.