There are two different 4 cyl. cams. The difference in the two is in the direction of the gear teeth on the rear of the cam.· There are also two different 6 cyl. cams. The older style with 4 bearings and a large nut for the timing gear, and the newer ETA cams with either 4 or 7 bearings and a bolt & dowel pin for the timing gear. The 278-310 degree grinds require heavy duty springs, either lash caps, larger eccentrics, or longer valve stems.
ROCKER RATIO 1.25:1 NEW STYLE ETA 1.55:1

NEW BILLETS ARE AVAILABLE FOR BOTH 4 AND 6 CYLINDER CAMS. 6 CYL CAMS ARE AVAI BLE WITH BOTH 4 AND 7 BEARING JOURNALS. LIMITED AVAILABILITY ON SOME MODELS. CALL FOR SPECIFICS.
Amazon Basics Steel Jack Auto Stands with 6,000 lb or 3 Ton (2.7 metric Ton) Capacity, 1 Pair, Black and Red
$28.69 (as of July 30, 2025 19:00 GMT -07:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)Pair of 3 Ton (2.7 metric Ton) jack stands with 6,000-pound capacity Self-locking ratchet means no locking key is necessary; meets ASME PASE-2014 Safety Standard for Portable Automotive Service Equipm... read more
Munchkin Brica Sun Safety Car Window Shade with Heat Alert, Helps Block UVA/UVB Rays, 2 Pack, Black
1% OffOptimal Coverage: Includes two auto shades, each measuring 15 x 19 inches (35.6 x 43.2 cm), for maximum sun protection White Hot Indicator: Turns white when the car becomes too hot, providing a safety... read more