WL #5 head

WL #5 heads partially modified for pop-up pistons

WL #5 headpartially modified for pop-up pistons

1941-1947 WR#6 head

1947 WR #6 head partially modified for pop-up pistons

1949 WR #6 heads

K head

KR head

Left: stock KR.
Right: Modified KR

KR head clearances
Taken from 1952-57 manual

KR head shapes
Taken from 1952-57 manual

Methanol running KR
All fins have been removed
Killer look!

Left: stock WL head
Right: good example of modified WL head.

WL, early WR [1941-1947] & K
head shape study