94 iron head camshaft in 99 roller camshaft block

[jaons_Wlp]

i was thinking and i cant figure out why a 3.4l 260h comp cam wouldnt work in a 99 3400 block? they look identical and both use the same camshaft position sensor, thats mounted at the same place? i dont have a 3.4l cam here to compare but it seems like it should work... both use camshaft bearings too. I would hate to spend $350 on a wotech cam and wait 3 weeks to get it when i could get a good Comp cam for $140 from summit and have it in a week. any thoughts?

[SappySE107]

Cam designed for iron heads vs aluminum heads. 10 more degrees duration, .030" more lift than the stock cam. About 6-8 hp increase. Flat tappet vs Roller. 3 bolt timing set vs 1 bolt. No idea if the CPS is compatible with the iron head cam.

[jaons_Wlp]

Cam designed for iron heads vs aluminum heads. 10 more degrees duration, .030" more lift than the stock cam. About 6-8 hp increase. Flat tappet vs Roller. 3 bolt timing set vs 1 bolt. No idea if the CPS is compatible with the iron head cam.

thanks. i figured it out though, the flat tappet cam lobes are cut at an angle so the lobe spins the lifter as it rises, a roller cam lobes are cut straight so it would destroy the lifters and cam unless i convert to flat tappet lifters and timing set, but that would be counter productive. do you know how big of a ratio rocker arms you cam run of a 3500/3400 hybrid? i see 1.7 and 1.8 ratio arms i would just have to get a stud conversion set from arp (8mm to 3/8")

[SappySE107]

There are no known options for rockers above 1.6:1