[volksworld]

ran a muncie behind a 350 / 350 on my tow truck /daily driver for about 15 years with no rear trans support and no problems....and i beat on the thing...seem to recall aluminum case trannies had a habit of snapping off mounting ears, but that could have been the result of lazy people only installing them with 3 bolts back then....when i installed the 454 i immediately tore all the teeth off first gear on a rolling start while trying to jet the bog out of the edelbrock....so an extra crossmember may be the least of your worries