Yella Terra aluminum roller rockers for your series 2 and 3 3800. These are the lightest rockers available and include pedistals, bolts and pushrods.

1.6 is the stock ratio.

1.7 will add some lift to whatever cam you are running. (people will run these with the smaller cams if they add ported heads)

1.8 ratio is intended for stock cams with higher mileage valve springs(or low lift aftermarket cam with ported heads).

1.84 ratio is the highest ratio that you can run on the stock valve springs.

1.9 ratio is for stock cams with aftermarket valve springs & retainers.

1.95 is the most aggressive ratio for a stock cam and obviously requires aftermarket valve springs & retainers.