running into same problem.. have a comp xe274 that requires double springs. im trying to find a single spring that will work so i dont have to machine nothing
There's a big single that should work. Possibly minor machining. Can't remember the number. It'll work for a street car to about .500" and keeping the rpm down around 6k. Otherwise just pop the heads, have them freshened for $3-$400 and cut the pockets and guides for dual springs. Be done with it. Common mod. Can even do it yourself if you think your heads are good and have a drill press and some skill. They sell the cutters that locate off the guide.
