X/stock redux

[Henrys Toy]

Originally Posted by Billy Nees

Hi Tom! You would re-tap the block for the SBC head. Bore spacings are the same. A 153 and a 230 both use 283 pistons but have a 3.25 (307) stroke.

Please don't mention that '64 4 door again in front of Yac please!!!!! Bad things could happen.

Good morning Billy and to all,
That 3.250 stroke is a 327 crank too.
The 1969 153 engine lists the rod as 5.700 with a 2.000 rod journal.
Then this also brings up a discussion that you and I had about bolting on the 305 head with the better intake valve and runner. Obviously that conversion (305 head) isn't a NHRA legal conversion for Stock or Super Stock. I'd still be curious to get a look at or a couple of pictures of what the 153 four cylinder head looks like. I better stop this or this might wind up in my Nova with Henry Jr. behind the wheel.

Respectfully,
Henry Kunz 1534 H/SA

P.S. bore and stroke is - 3.875 (std.) bore and 3.250 stroke (307 & 327)