Questions about Big Block Chevy Tall Deck Engines

[Tom Sharpe]

Gwyn Reedy wrote:

>
>
>  Don't know just where to go for help with this kind of
>  information. Any answers or leads gratefully appreciated.
>
>  1. What was the bore and stroke of the 366 engine?
>

The 366/427 tall block had really tall 4 ring pistons. Rods\ crank and
heads were the same. There are spacers available to allow regular
intakes on tall blocks. The 366 is a small bore, check thickness for
overbore. most early 402s can go to 4.250 (427) (+.125)  396 would be
+.154, 366 would be +.315..... .160 a side.

Most tall block builders use longer rods for better angles/power.


366T = 3.935" x 3.76"
396 = 4.096" x 3.76"
402 = 4.125" x 3.76"
427 = 4.250" x 3.76"
427T = 4.250" x 3.76"
454 = 4.250" x 4.00"
502 = 4.466" x 4.00"

T = Tall Deck

ALL production big blocks used a 6.135" rod.

regards  Tom