Uhhh, one more item I forgot to add is that if you have long tube hedders now, you won't be able to use them on the engine with the aod attached. It is just too wide for most of the long tubes. There are some you can buy...or use some shorties. I had to ditch my long tube hedders and put the lethargic original 302 exhaust manifolds on so I could start driving. But, I am also getting ready to order some shorties that will work and then have to re-do my exhaust to match. The shorties that come on a 5.0 will not work either because they are too wide for the shock towers. I have a pair that came on the 5.0 HO that I am using and they will not work in the 66 engine bay...but maybe in the 67 that you have?