my 355 heads are the biggest heads you can get without going to 202's i have a performer intake on this motor also have headers the pistons are flat top pistons the motor is just a plane motor i wanted to find a good nice healthy cam to go with and i want it to hit good but i dont want to over cam my motor and i was also woundering if a 700R4 Tranny is any good to run behinde that motor whatever cam i go with iam going to change the springs out and the lifters i was wanting to get 400 hp out of the motor i am not sure what a 355 stock produces i was also woundering if 373 gears would be good gears to run i dont want to spin out i want to grip and go also dont wanna haft to use a big conveter on it and would the heads be ok to use or would i be better off geting some bigger ones well just want some help on this build i never had to choose a cam for one just always went stock