Ok so I'm getting ready to start assembly on my motor but I have this annoying feeling that the guy at isky cams was wrong I have a 280 mega cam that they helped me select but they said I would be fine running it with my stock valve spring... Here is where I am loosing sleep this cam has .565 lift will my springs really be able to keep up with this I have 049 heads with dual valve springs and I was not planing on turning this motor over 5-5300 help please if I need the spring I wanna order them now as not to hang up my build I wanna get out on the water befor the season is cometly over lol

ok to start i have a 76 hawaiian daycruiser project now the stringers are 24 inches the widest mounts i can find for the 460 is 21 inches and i cant use the old mounts cause to say it nicely they are a true hack job and pretty scary so what i wanted to do is thicken the stringers with wood, bolt the wood to the stringers and fiberglass them then the mount would fit correctly... would this work? sorry if this is a stupid question