Editing Pontiac V8 engine (section)

==={{anchor|326|336}} 326/336===
[[File:1967 326 c.i. pontiac firebird engine.jpg|thumb|Pontiac 326 engine in 1967 Firebird]]
In 1963 Pontiac dropped the Buick division built [[Buick V8 engine#215|215 cu. in. aluminum V8]] it had offered in the [[Pontiac Tempest|Tempest]] and replaced it with a small-bore version of the standard {{cvt|389|cuin|L|1}} Pontiac V8. It shared the 389's {{cvt|3+3/4|in|mm|1}} stroke, but its bore was {{cvt|3.78|in|mm|1}} for a displacement of {{cvt|336.66|CID|L|1}}. It was rated at {{cvt|250|hp|0}} with 8.6:1 compression and {{cvt|260|hp|kW|0}} at 10.25:1 compression. Both used a single two-barrel carburetor. In 1964 when the new "A" body intermediates came out there was a new corporate (GM) engine size limitation to anything less than {{cvt|330|cuin|L|1}}. and so the 326 bore size was reduced to {{cvt|3.72|in|mm|1}}, giving a true {{cvt|326.06|cuin|L|1}}. The 326 subsequently became the optional V8 engine for Tempests, and later the [[Pontiac Firebird]], through 1967 and maintained the 17 degree cylinder head valve angle for its entire production run.

A higher-output four-barrel carburetor version was offered, called the 326 HO (High Output). With higher compression and dual exhaust it produced {{cvt|280|hp|kW|0}} for 1963–1964, and {{cvt|285|hp|kW|0}} for 1965 through 1967, its final year.