L-72 heads casting # ends in 840 and are square port. L-36 heads are oval port and end in 215. L-72 intakes are aluminum Winters snowflake. L-36 are cast iron, ends in 948. Don S
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L-72 heads casting # ends in 840 and are square port. L-36 heads are oval port and end in 215. L-72 intakes are aluminum Winters snowflake. L-36 are cast iron, ends in 948. Don S
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on 4/2/2019, 3:48 pm, in reply to "