They were Dart II when they came out in 1987 I think (cant remember the exact year)
They were designed by the owner of Dart and World , They were called Dart II Cylinder Heads
Later, I dont remember the year, Dart broke off from World (dont know which one called it an end) and the head was called the Sportsman II
Yup - those are them. Bought them in 1990. Came in 2 chamber sizes - 65 & 72cc (or was it 76cc?) straight or angle plug. I still have the instruction sheet for them but no part #'s, chamber sizes & if they are worthy.
Some information above for you
What is you application? Car specs? Engine Specs? What do you want from the engine?
68 el camino
The heads are fully ported & polished, 2.02/1.60 valves - exhausts are undercut (kind of scares me).
4 bolt 383 small block. Weiand dual plane 8004 intake, q-jet carb. Crower hydraulic: 210/218 .421/.444 112 lobe seperation
Hedman headers - primary tube size unknown, 3" collectors, 2.5" exhaust w/ turbo mufflers.
350 trans. 2500 stall convertor, 3.73 12 bolt posi. Have a 700r4 sitting on the sideline.
The guy that did the heads for me picked two cams for me - I went with the conservitive cam because of smog at the time & it was my dailly driver. I know it's a small cam & there is some room for improvement. Can anybody run my #'s thru a dyno program?
Chris's thread New Camshaft brings a smile to my face
got me thinking. Cams (& heads) have come along way in the last 20 years & I wondered if these heads would keep up with a roller... Car is 95% street driven, been ahwile since it's been to the track.
I'd like a big flat torque curve, more HP & more choppy idle, but will work with an overdrive (i know cake & eat it too).