I have a 64-80 that im doing a 196 and a t-18 swap into. I have heard that the fire wall needs to be dented some to allow removal of the valve cover. Is there any truth in this? Also are there any other clearance issues that I need to be aware of. I have all new mounts for both and I do know that the trans cross member will need to be moved back to accomidate the larger trans but would like to stay ahead of the ball instead of behind it. Thanks