sbc bellhousing questions

alright, i need to know if a bellhousing for a 153 tooth flywheel is externally smaller than a 168 tooth flywheel bellhousing. what dimensions would be different? would the bellhousing be shorter (length wise)? smaller diameter wise? and would it slope off faster (shrink to the 4 bolt hole pattern size quicker)

im looking for a smaller bellhousing for a hybrid swap im doing, and im thinking that a 153tooth will help me out? how much difference would be great! will i save a full 1/2" or more?

thanks in advance,
chris

i considered this when i did a v8 s-10. after i did a whole but of searching the only conclusion i found was that the faces are identical almost. they also used the same convertor is was told( dont quote) so i would not see a benifit.

Yes it is,on a four speed trans bell housing it is. that's what i have in mine. the bell housing slopes down very quickly . hope this helps