Are auto trans different? I have a thick aluminum spacer on my engine and have a photo of another 69 w auto with the thick plate also. Should not make a difference but these are 69 Cyclones.
That is exactly the spacer my M code FMX Mach 1 was born with, and still on the car when I bought it in 1981 with the engine haven't been apart before.
Still have it on my shelf, but the car now has a C9OX intake and 428CJ thin bakelite spacer with straight pcv nipple unlike Boss 302 spacer with angled nipple.
Needed hood clearance with the tall Buddy Bar intake even with the low pro 428 shaker bowl with 351 midplate.
No snorkel, just an Australian Falcon XY GT block off plate and the flapper always full open.
A dogs breakfast of parts under the hood.