1959 Chevrolet 348
Bored / Stroked to 427 cubic inches !
For Duane, from Alaska !
We are just starting on a new engine for Duane. It's a 1959 348 bored .125", then stroked with a modified forged steel 3.76" stroke 396/427 crank.... giving 427 CID. We will be using a set of our exclusive newly designed forged pistons in 10:1 compression, with lightened big block Chevy connecting rods.
In order from left to right: regular production 3.25" stroke 348 crank... regular production 3.5" stroke 409 crtankshaft... regular production 3.76" stroke 396/427 forged crankshaft... and a modified/lightened version of the forged 396/427 crank like what will be used in this 427 CID 348. The cranks are EASILY identified when installed, observed from the outside of the engine, the rear flange is distinctive to each.
Far right, left is modified 396/427 crankshaft, on the right is the regular production 409 crank for comparison. Note the similar appearance of the two.
This is the modified 348 oil pan that was prepared by Aaron Hufnagle in Minnesota ! Just behind it is the complete Comp Cams hydraulic cam and valve train that will be going in Duane's engine. On the right are Duane's custom made .125" over 348 forged pistons for use with a 427 crankshaft.
Here is Duane's block and crank back from the machine shop. Note the unique Canadian stamping number. Casting date indicates that this engine would have been in a very late 1959 Chevrolet or Canadian Pontiac. Block is bored .125", giving 427 CID. Here you can see the area where the crankshaft counterweights were machined down 5/16" on the leading and trailing outside surfaces. Note the unique 396/427 flywheel flange.
New Manley H beam 6.135" BBC rods ready to install on pistons. Bottom end assembled.
Pistons in, block ready for paint.
Updated July 6, 2006
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