has any1 tried to put a LT4 intake on LT1 heads?? does any1 know if it will fit? i was curious if this worked, I'm sure it will but i wanna be sure before i do it, the only thing would be that the intake ports on the manifold would be a little larger than the ports on the head

 

A search probably would find all the info you need, but no, it will not fit without machining of the intake or the heads to resolve interference problems. There is virtually no benefit of sticking an LT4 manifold on LT1 heads. The power gains are in the LT4 heads.