Actually yes it is, We moved it back as far as we could when we mounted the engine with a plate, which was a while ago. It went back almost 3/4" IIRC and we used up all the slot on the trans mount but left enough room for trans bolts.
However at the time we forgot to factor in trans shields, they tend to be a PITA to fit now grin
It's always been heavy, with the 655 we guessed it was around 4000lb since the last time we weighed it was with a single Dom 572, it was around 3920lb then.
We have added stuff, but I really thought it would be lighter. It was 3819 lb without me in. It is what it is. smile

'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03