Anyone Own/ Drive a Max Wedge Car

70Swinger440 said

I thought the '62 420 horse 413 had 12.5:1 pistons. The '63 Stage II 425 horse 426 had 13.5:1 pistons. That's what was in my dad's Polara.

Click to expand...

70 Swinger 440

No,

The 1962 ~ 413/420 HP 'Maximum Performance' came thru with 13.5-1 Pistons.

Damn near impossible to run on the Street, even with the 'highest' Octane
Gas back in 1967.

1963 and 1964 Engines >
* 426/415 HP .... 11.0-1 Compression
* 426/425 HP .... 12.5-1 Compression