425 rocket
April 19th, 2018, 07:58 PM
#2
Old(s) Fart
Join Date: Mar 2007
Location: Northern VA
Posts: 47,259
The 425 is exernally identical to the 455, and lots of those have been swapped into G-body Cutlii. The biggest problem is that the 1967-older motors have a different crank flange bolt pattern, so you will need the correct flywheel. Also, use the G-body frame pads and motor mounts from the 307. Use W/Z exhaust manifold or the G-body BBO headers.
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steve walker
Big Blocks
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December 17th, 2019 12:32 PM
