All Small Six Possible heads for 250 series

[hairyclive]

I was looking at specs for the Toyota 4 valve 5.7 V8 DOHC heads and the bore spacing is very close to the 250 six. Might be possible to Frankenstein a DOHC 4 valve head together from a couple of heads from the Toyota. Would be similar concept to the Batten Cleveland 300 head used on the Preparation H dragster.

https://www.hotrod.com/features/worlds-fastest-six-cylinder-door-slammer-may-1975-982-716-72-1/

 

[aussie7mains]

Just get a Barra, save yourself all the grief. DOHC variable cam timing 4valve, 198kw NA.