yes, that's way forward of original or what folks usually do - the original mounts have the valve cover just an inch or 2 from the firewall, so tight that an HEI distributor won't fit without indenting the firewall, and the lower pully [in front of balancer] is just about flush with the
back of that front crossmember, yours is at the front of it
you have the 'factory' car or after-1960 truck mounts, but the
55-59 mounts are this [note pulley], off the front of the block where you'll see bosses and holes in your block, usually used for accessories on 350's
looks like a good install, but there must be a longer driveshaft, or a longer trans ... sometimes folks wind up eliminating the e-brake cross shaft there because the side mounts would be right at the same point to use the original trans and driveshaft
Bill