A question about a 69 273

check your block cast build date that will tell you for sure if its 69 or not,as long as the block was built from 66 up you can use the LD4B otherwise from 65 down D4B.Theres a vendor on the Aussie Ebay site selling one of the early type manifolds but has it listed for 273-360 which will only work with the early 273s unless the bolt holes have been re- drilled to except the later 66 heads.I have a LD4B in good condition with no porting done on the runners but the shipping cost from Australia to the US will hurt.