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i picked up an old 283 engine with the old power pack heads i wanted to use them on a 350 4 boilt but don't know if thay are worth the effort to put the work in to them i know that they have a 59 cc and only a 137 intake port vol.could anybody tell me if they are good heads or not on a 350. thanks and have a merry christmas and happy new year.
10.7 or less compression with iron heads isn't a big deal if you know what your doing and plan on running 91 minimum octane.
I ran several variations with 10.74 c/r with 186 casting and 292 casting. You just need correct cam timing, recourved ignitions, and a good cooling system with 180 thermostat
little tiny ports and valves are best left on sub 300 ci motors. In this day and age of cheap aftermarket heads it's not even worth putting money into double hump heads with 2.02/1.60 unless you have to have a matching number engine.
Len
I would have thought it was a good idea to put larger valves in the power pack heads and use them on the 350. The higher compression would make it seem like a good way to boost your HP.
It's a good thing we have Richard on this forum to explain things like this.
Thank you Tech1
The only problem I could think of is that the 283 heads don't have the boltholes on the ends for the 350 accessories.
The good news is power pack heads bring a good price on ebay.
tech 1 and Al show
Thanks for the info you have been alot of help.so i guess the real question is what head to use to get 300 or more horsepower with a 350.i was thinking vorteck heads.