Not true, if you look at a 1989 Distributor rotation for example on a LO5 350 TBI. you will see the distributor rotation is counter clockwise. Looking at the cap where it is square #1 is on the right then #8 next to it on left of square then so on in a counter clockwise rotation. #1 and #8 are positioned toward firewall. Believe this started in 1988. Now on my 1987 LO5 350 it's a clockwise rotation distributor with #1 up front toward front of car with #8 to the right of it and so on in a clockwise rotation. There also seems to be a lot of confusion on rotations of water pumps. My 1987 GMC Jimmy ( full size) LO5 350 was equipped from the factory with a combination serpentine/v belt System with one of the v belts running the water pump. Because the v belt runs the water pump it is a clockwise rotation pump. On 5.7 350 with full serpentine systems they are reverse rotation. If the pulley is of the v design it's a clockwise rotation pump if it's smooth it's a reverse rotation. Belt goes around the circumference of belt like the v belt does it's a clockwise rotation. If the back portion of the belt( serpentine ) contacts against smooth pulley it's reverse rotation.
clockwise
clockwise
clockwise
Clockwise.
Clockwise
Clockwise.
Clockwise
Rotor turns clockwise.
Rtr. turning clockwise. Rotate distributor counter clockwise to advance timing, clockwise to retard.
Unless it has a BOP (Buick/Olds/Pontiac) motor such as a 307, rotation will be clockwise.
Counter clockwise to advance.......clockwise to retard
depends 5.0 vin Y counter clockwise/ 5.7 vin E clockwise 4.3 all clockwise 1990-1993