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Boss 429 Cam Tunnel Plug

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Boss 429 Cam Tunnel Plug Empty Boss 429 Cam Tunnel Plug

Post  enginetech April 18th 2021, 5:01 pm

OI noticed the rear of this Boss 429 block in my shop has a couple of tapped holes near the rear of the cam tunnel.  Was a bolted plug used for these blocks?  I can find nothing on the subject online.

enginetech

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Join date : 2018-06-14

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Boss 429 Cam Tunnel Plug Empty Re: Boss 429 Cam Tunnel Plug

Post  Paul Kane April 18th 2021, 7:06 pm

As viewed from the rear of the Boss 429 engine block, the four passages/holes alongside the cam tunnel (two passages on each side) should be 3/8-NPT pipe thread and plugged with a 3/8-NPT pipe plug.
Paul Kane
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Boss 429 Cam Tunnel Plug Empty Re: Boss 429 Cam Tunnel Plug

Post  BOSS 429 April 18th 2021, 11:58 pm

from factory no, but Nascar guys sometimes ran a plate over the rear cam plug. and other racers, be sure to install the correct restrictors in the block if you are building one.
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