1962 lancer help

I dropped a 340 into a 65 A-body wagon, back in 75ish.
It was tight and there was no way to fit exhaust manifolds on it so I went with fenderwell headers. And a 904 push-button.
Your lancer looks a lil tighter between the shock-towers, but that could just be the camera. What I like about the lancer is the semi-circular rear wheel openings; add a lil altitude back there and I can see faaaat tires in there no problem, unlike the later Valiants. If you put a 360 in there, yur gonna need a lotta rubber; 295s or better.