Editing Pontiac V8 engine (section)

===350 HO===
In 1968, there was also a 350 "HO" which had increased power with the addition of higher compression #18 heads (#17 and #46 were the most common 2-barrel heads), a four-barrel carburetor and matching intake that was also used on the 400 and 428 engines. There was also the addition of dual exhaust, and for vehicles equipped with a manual transmission, a slightly more aggressive camshaft.

In 1969 the 350 HO was upgraded again with the addition of the 400 HO cam, commonly referred to by enthusiasts as the 068 cam. Also added was the #48 casting number heads with a {{cvt|68|cc|2|adj=on}} chamber for higher compression, along with larger {{cvt|2.11|and|1.77|in}} valves. Free-flowing exhaust manifolds from the 400 Ram Air were used late in the model year. This was underrated at {{cvt|330|hp|0}}.