Well I just found my old Carter HI-performance fuel system catalog 1968. and my Chrysler HI- performance parts catalog 1968. many neet parts. It lists the 64-65 273 hi-po single ext system. 10 diff part numbers. With a very good pic. The 273 hi-po cam listed as 248 degree .425 lift. And many 426 Hemi parts. And my 1968 Carter metering jet and rod chart. I have some other Carter parts books. But have not found it yet.