'65 Barracuda, what order now ?

My experience with these projects is : Install engine and trans : set them on their mounts , secure trans mission on it's mount but do not secure engine , place floor jack under oil pan and lift engine . Place a 2x4 about 1 1/2" long between engine mount and K-member . Lower engine onto blocks . You are going to need a right angle oil filter adapter . Install right side header from top , leave it loose . You may or may not be able to install left header from top . Once left header is installed loose , you can remove the wood blocks and secure engine and tighten headers . If your car came with a /6 the centerlink needs to be changed to a v-8 for pan clearance . good luck and let the fun begin