[UK SD455 MUSCLE CARS]

Thanks for the welcome. Sorry about the delayed reply but even though I suffer from insomnia 5am is about my limit!
Ive tried to upload pictures but it fails each time. The files are too large and I dont know how to shrink them! any guidence??

The cam I mentioned stamped "A" is definately the original cam from an untouched 74 SD455 and the lobe profiles match a NOS SD cam I have, as does the distributor drive gear on the cam. Whats with the "A"????