I want to thank you guys for the responses about my question regarding swapping out my 327 with a 454. As I move ahead with this project, I went to mount my new edelbrock fuel pump. First I pulled my small block pump off to get the pushrod out to use in the Big block. I think I read somewhere that this is permissable. Anyway, the problem is that this pushrod won't go in all the way. There is some interference that won't allow the pushrod to slide all the way in to the cam. This is a '78 454 block. Anyone know what is happening here? I appreciate the help.