Build certificates

I was wondering if anyone knows of another source besides British  Motor 
Heritage for a build certificate. They were unable to read my  commision # data 
 
on the microfilm, they said it was to blurry.  Any thoughts on a V8 conversion, 
pros and cons would be appreciated  also. I've been thinking about installing 
a 289ci in a TR2. The car needs a  total restoration, so I was just toying 
with the idea.
Joe Calandriello
54 TR2