Ok so im getting rid of the old tired 305 in my camaro and installing a 400 sbc. my 305 was bolted up with a powerglide and the 400 was bolted up with a 4 speed muncie transmission. my question is will i need to buy a new flexplate for my engine if all im doing is just swapping engines. i talked to a couple guys and they told me that i will be ok by using everything that was with the old 305 such as the torque converter flexplate and starter. all im planning on doin is using the 400 with my powerglid but will the starter and the flexplate be usable with my 400? and how do i know if i need an internal or external balanced flexplate? any input is greatly appreciated. Thanks a million!