Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
The 98-99 is a 2 piece trans, the bellhousing could be swapped, but it is slightly smaller as it is designed for a 298mm torque converter, the 04 torque converter is 300mm not much of a difference but the bellhousing size is noticeable different.I'm not sure I'm following you. 98-99 OBS bell housing... you'd have to swap transmission, right?
Can you just drill/tap your 04 Bell housing for the rods?
I could of sworn I saw somewhere that the poly transmission mounts cause issues like this... don't recall where though.
You can't mix poly and rubber mounts. That's causes a lot of issues. With twisting, cracking, and breaking stuff