My apologies in advance if this subject is covered in a previous thread--(I could not locate the search function at least not with my Chrome browser).
I am looking for some definitive information as to the exact differences between the BRM P126 and P133. It appears to me that the key specs.. wheelbase, track, engine type, etc. are identical, but there must be some changes or modifications to have justified the change in model number.
Any help or link to other sites with this data/information would be most appreciated.
Thank you in advance,
Mark