[Roadsters] U20 Head Info Needed (Tom Hendricksen)

[stevenehlers at charter.net]

Oops ! Sorry people for the band width without posting removal.....

Hey Tom Hendricksen,

The Stock heads were about 4.528"  or 115 mm . This engine stock is 9.5 
to 1 ,so Super Unleaded is
needed on a Fresh and or healthy engine . If you have cut .020 to .030 
cut from bottom only in past ,you were closer to 10 to 1 and you must 
use super ,unless serious chamber work is done . This is something I 
learned to do more than 30 years ago on a U-20 . I also recommend that 
you have Steel type intake seats installed ,due to pounded out brass 
ones and the fact we only have Unleaded now . Rocker arm Geometry issues 
and  cam stand shims are the norm for old used and previously heavily 
warped 2-liter heads . Dean and Dann can enlighten you if you wanted 
more opinions and info .

Steve Ehlers
Rising Sun Performace Inc.
Texas's oldest Datsun Z car Specialty Shop