Yes. SVO A-3 heads take different than stock intake & exhaust gaskets and ALSO different than C-302B SVO heads, or C-3L Yates heads. Fel-Pro stocks gaskets according to port dimensions. I use Fel-Pro# 1241 intake (2.20"x 1.35") and Fel-Pro #1431 (1.81") on my unported A-3 heads. PAW in So-Cal stocks them.
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