For SBC w/ Rectangular Port (1.31 X 2.21); 0.065" Thick
For 1958-86 SBC; 1.28" Wide X 2.09" Tall Port; .060" Thick
For SBC-Vortec; 1.08" Wide X 2.11" Tall Port; .120" Thick
SBC, 1.23" Wide X 1.99" Tall Port, .060" Thick, Stock Port
SBC, 1.28" Wide X 2.09" Tall Port, .060" Thick, Small Race Port
SBC, 1.34" Wide X 2.21" Tall Port, .060" Thick, Medium Race Ports
SBC, 1.38" Wide X 2.28" Tall Port, .060" Thick, Large Race Ports
BBC, 1.82" Wide X 2.05" Tall Port, .060" Thick, Conventional Ports
SBF 289/351W, 1.20" Wide X 2.00" Tall Port, .060" Thick, Small Race Ports
BBC, 1.25" Wide X 2.36" Tall Port, .060" Thick, Conventional Ports
SBC Vortec, 1.08" Wide X 2.11" Tall Port, .120" Thick, Vortec Head
SBC, 1.31" Wide X 2.21" Tall Port, .120" Thick, Medium Race Ports
SBC, 1.25" Wide x 2.00" Tall Port, .060" Thick
SBC, 1.32" Wide x 2.20" Tall Port, .060" Thick
SBC, 1.32" Wide x 2.32" Tall Port, .060" Thick
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