Originally Posted by Mayvik
I don't think this will work without a new back block. The SA-8 is a deeper block, and the geometry is completely different. T8 has a brass adapter that threads in, SA-8 is just a plug. Lighter, shorter spring is probably your best bet without basically milling a new block.
I don't think that'll work either but that was next on my list to check. T8 backblock is held on by 2 screws vs 4 on the SA-8 if I recall correctly from taking it apart the other evening.
I saw a video by a tiberius worker on youtube he said that some of the original t8's have 2 screws. he said that most of the t8's have 4 screws.