70Nova, Changing from a 240h to a 268h seems like a HUGE jump up in cam size to me. I looked in the Comp catalog and they list the same spring for a 240,252,260h cams and also for a 252 in a sbc. IIRC this is a 230 right? If so the same cam will act bigger than in a 250. If you were to pick a 252 or 260 cam it would be at least worth the trouble to check for coil bind clearance with the sbc springs that you have. If this works it could save some money at the machine shop. The lumps in the head will let you get away with a smaller cam and have the same performance as a non lump with a bigger cam. There are LOTS of people with WAAAY more knowledge than me. There are also other cams. SCRAPIRON,#4711 ran a mercruiser cam that he liked. I don't know the specs maybe he will chime in. Can you also post what trans and axle that will be used? Jay
