v6 k member hemi 5.7 issue?

Ok, so little background.
My 73 dart was originally an inline 6 (least I was told so), I didn't come with the inline 6 or stock tranny, but a 360 block outta truck.
I have since rebuild the entire suspension, painted it all up, etc.

Monday, I walked into a steal, 5.7 hemi complete (minus harness and pc), $200. So i bought it.
Since then, I have researched and have looked at TTI. They say the mounts they make only fit a v8 k member.
The K member I have now uses spool mounts, the TTI mounts are spool.

1. Is the K member I currently have a v6? or v8? because of the spool mount.
2. Because I have spool mount K member, Can I use the TTI mounts for 5.7 hemi?

If all else fails, I do have a k member from a 72 dart, that was a 318 v8, it is biscuit mount though...looks ugly, would need prep and me ripping suspension apart again.....wanna avoid that for time being.

Thanks in advance,

ps will attach best pic I have offhand of current K member that came with car (assuming its the inline 6 based off the sellers info...may be wrong)