I have an original 1965 Pontiac Owners manual, Part No. 8738263, FIRST EDITION, Printed in Canada.
There is one page with engine specifications for the 230-6, 283 2bbl V8, 327 4bbl V8 - 250 HP, 327 4bbl V8 - 300 HP, 409 4bbl V8, 409 4bbl V8 Special Cam.