1850 Dolomite question

["Huw Upshall" <hupshall@triumphcars.com>]

People in the know must be able to answer this question:

The TR7 engine and the 1850 Dolomite engine look the same from the outside.
I know of the internal differences but will a TR7 engine drop into a 1850
with no modifications?  I'm not talking about the sprint.

Thanks.