poly mounts or a mid/front plate for a body

CS1121 said
I currently have a 74 dart thats going to be a street strip deal (this uses spool mounts on the k member)

8.50 cage (nothing ties into the engine bay)
4 link
sub frame connectors
torque boxes
welded k member
512" nitrous big block
727 w/ brake

at what point should i be considering a mid plate/ motor plate? if i use poly motor and trans mounts with a torque strap and something to control the motor moving forward and backwards is that suitable? they dont offer solid mounts for these cars.

or at a certain level is the motor plates necessary? i don't know the limits of the spool mounts on these cars. id like to know what guys doing 1.10-1.30 60fts are using

thanks

View attachment 1716404838

What spool mounts does it currently have?
Factory spool mounts with polyurethane inserts on a modified k-frame will hold up. Conversion spool mounds like the Schumacher mounts with polyurethane should hold up.

If you use either spool mount and a proper 74 transmission mount with polyurethane inserts you won't need anything to control forward/rearward movement. That is needed with a motor plate setup though.