Senior Tech
Ron
Join Date: Nov 2006
Location: North Channel Lake Huron
Posts: 3,934
Re: 1968 blocks
The Plugs you referring to are probably Lifter Gallery End Plugs. Some are pressed in Stamping like a Frost plug whereas other are tapped with threaded Plugs. The 68 large Journal 327 is a most desirable engine. Some came with Forged Cranks. Even some 2BBL's came with 1.94/1.55 Fuelie heads (Camel Hump). The 350 and 360 Hp 327's had 2.02/1.6 Valves. The 291 and 292 head casting are Identical were the smaller valve 291 Casting can easily be machined for larger Valves and screw in Studs. The same head was used on the 302DZ engine. The Spring Pockets can be opened up to 1.439". It only takes basic hotrodding to get 425 Hp and over 7500rpm with these engines. None were 4 bolt; however, some marine 327's with forged cranks were built with the 4 bolt 010 block starting in late 68 and 69.
Oh there might be a 2 holes in the front of the Block into the Lifter Valley with engines originally equipped with Smog Pumps.
Z15CAM - There was a Viper in my Rear View
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This was my 70 1/2 Z28
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Last edited by Z15CAM; Aug 8th, 08 at 12:09 AM.