Boss 420 heads

[shlb69]

Started trying to put some of my boss 429 heads together in the garage

[69mach351w]

You typed Boss 420 heads in your subject box.

[shlb69]

Alright guys

[shlb69]

Photo

[JD]

Image above cropped - might be easier to view, can delete if wanted...

[2112]

Are they O-ringed heads?

Are you going to build a couple engines?

[shlb69]

They are oringed  and if I can't find any blocks to put a engine together will most likely sell them

[2112]

Well, with external oil drain backs, you can always use one of these.

https://jonkaaseracingengines.com/shop/cylinder-blocks/ford-racing-svo-bbf-a-460-cylinder-block-large-bore/

Those heads would love more cubic inches to feed.

[pbf777]

     Just a note:  The M-6010-A460  Blocks have been discontinued, to be replaced by the M-6010-A460X block, with a current availability date of Dec. 31st (  maybe?     ).

     Scott.

[2112]

     Just a note:  The M-6010-A460  Blocks have been discontinued, to be replaced by the M-6010-A460X block, with a current availability date of Dec. 31st (  maybe?     ).

     Scott.

Have they made design changes?