Long story short, I installed the 292 in the 66 burb with out the valve train on it, rockers and pushrods. Now a year, and much installation later, I have tried to install them, and there is not enough room to get the back (2) pushrods in the engine, because they hit the cowling above the firewall. Please tell me there is a way to do this without having to pull the motor out. Thank you for your help.