I was never really a big BL fan but my fading memory of the time was they started with the dolly sprint motor needed I think 100 had to be built for Homoligation they built a lot less . BL was in a bit of a pickle at the time they then abandoned the project and went v8. In the intervening years many standard Tr7's were converted to v8's with the club boys and quite a few really good recreations. Em