403 rebuild

[Stuart Harbottle]

I have just O/H my sons 403 the only thing I have changed is the cam the original one up performance cam for that engine specified by GM. Engine runs great however when I shift int gear she stalls out!! any help.

 

[Buickman225]

Sounds like you have a vacum problem to me. Tell me what kind of cam did you use I am getting ready to rebuild my 403