I have a 1971 396 motor. Will this fit in a 1967 Lemans? Right now the car has a 327 in it.

I have a 1971 396 motor. Will this fit in a 1967 Lemans? Right now the car has a 327 in it.

may want to try "non-pontiac engines in pontiacs" forum, you'll get lots of feedback there. Theres a thread about a 454 into a LeMans that may help--I assume it would be just like a big block swap into a small-block chevelle.

Why dont you put a real Pontiac motor in a real Pontiac car and not disgracing it.A 67 Le Mans with a big block in makes me want to throw up,very uncool car.

I have a 1971 396 motor. Will this fit in a 1967 Lemans?

Sure will.

You'll need the big-block frame mounts (engine mounts bolt to these) from the same year Chevelle to bolt the engine in. Plus every thing else such as headers and accessory brackets for a big-block Chevelle.

Just to set things straight, there is no such thing as a '71 396. '69 was the last year for a true 396. The '70-'72 Chevelles marked "SS396" are a model, not an engine size, unlike previous years.
The smaller BBC in '71 was a 402. It's basically a .030" over 396, with one VERY IMPORTANT difference. The crankshaft in a 396 is a good forging (same part number as 366 and 427). The 402 has a cast crank. Unlike Pontiacs, the cast Chevy crank is not up to serious performance. 402 also shared heads with 454, and they aren't the "good" ones. They have the larger oval intake ports, which isn';t a bad thing. But they also have HUGE chambers, with a urine-impoverished shape, especially behind the exhaust valve. The better oval port heads are from the '68-'69 "open chamber" engines.
I agree. Put a 400 Pontiac in it. It will STOMP that 402 if properly done. It usually takes a bigger BBC to beat a Pontiac in street trim, unless "high performance" BBC parts are used, and that makes for woefull drivability and low-speed performance.