Some more random pony car data, 4bbl engines from 70-74 with hp ratings.
70-71 is SAE gross, 72-74 is SAE net
Javelin SST '70: 360-290hp, 390-325hp
Javelin SST & AMX '71: 360-285hp, 401-330hp
Javelin SST & AMX '72: 401-255hp, 360-220hp*, 360-195hp
Javelin & AMX '73: Same engines as '72
Javelin AMX '74: 401-235hp, 360-220hp*, 360-195hp
*=dual exhaust
Camaro SS & Z28 '70: 350-360hp*, 396-375hp, 396-350hp, 350-300hp
Camaro SS & Z28 '71: 350-330hp*, 396(402)-300hp, 350-270hp
Camaro SS & Z28 '72: 350-255hp*, 396(402)-240hp, 350-200hp
Camaro & Z28 '73: 350-245hp*, 350-175hp
Camaro & Z28 '74: 350-245hp*, 350-185hp, 350-160hp
*=z28 only
Challenger (r/t, ta, A66, and others) '70: 426-425hp, 440-390hp, 440-375hp, 383-335hp, 383-330hp, 340-290hp*, 340-275hp
Challenger (r/t and others) '71: 426-425hp, 440-385hp, 383-300hp, 340-275hp
Challenger & Rallye '72: 340-240hp
Challenger & Rallye '73: Same as '72
Challenger & Rallye '74: 360-245hp
*=TA only
Mustang Boss's & Mach 1 '70: 429-375hp*, 428scj-335hp, 428cj-335hp, 351-300hp, 302-290hp*
Mustang Boss & Mach 1 '71: 429cj-r-370hp, 429cj-370hp, 351-330hp*, 351-285hp
Mustang Mach 1 '72: 351-275hp, 351-266hp
Mustang Mach 1 '73: 351-266hp
Mustang II Mach 1 '74: 351-255hp
*=Boss only
Cougar Models '70: Same as ford, less 429
Cougar Models '71: Same as ford, less 351-330hp
Cougar Models '72: 351-266hp, 351-248hp
Cougar Models '73: Same as ford
Cuda, Barracuda, & AAR, and such: see dodge challenger engines 70-74
Firebird, Formula, & Trans Am '70: 400-345hp, 400-335hp, 400-330hp
Firebird Formula & Trans Am '71: 455-335hp, 455-325hp, 400-300hp
Firebird Formula & Trans Am '72: 455-300hp, 400-250hp
Firebird Formula & Trans Am '73: sd455-290hp, 455-250hp, 400-230hp
Firebird Formula & Trans Am '74: Same as '73