Another 360 to 904 question

so I also have a 72 360 that i've hooked up to a 904 and the flywheel that i bought from summit is a bit suspect to me. I know from experience that if the tongue converter is not seated correctly and you putt it in gear the your screwed. the flywheel that they sold me seems to push my to urge converter really close to all the way in but not !00% sure about it. It's one of those flat disk shaped ones. Any idea if this will work out ok?