i do these installs at work. actually, directed electronics makes viper and clifford. the clifford 3.5x is the all in one unit, just like the viper 791 xv. they are identical in wires and everything, just different color remotes. the clifford 3.5x was taken off the shelf this year and replaced by the 791 xv. for next year, we should have clifford again. i got the clifford 2.5 x for my brother in law's 2000 SI. he didn't want remote start.
as for the hoodpin switch, it is included in the package, but we recomment you get the mercury switch. it's more efficient and doesn't rust out. it's like $15, but cheaper for me. when you life the hood, the mercury moves to the other side and hits the sensor and triggers the alarm.