427/875 heads

[SSDiv6]

Originally Posted by Adger Smith

Is anyone familiar with these BBC heads?:

10049875 10049875 376/R 83 (o) 2.28/1.88 Pontiac small port head
10045427 10045427 460/R 91 (o) 2.40/1.90 Pontiac large port head

What are the common OAL valve length for these heads?
Thanks,
Adger Smith
adgersperf@aol.com

Big Port: Intake - 6.605", Exhaust - 6.45"

The small port heads were made by Brodix:
Intake - 5.471", Exhaust - 5.450"