[blondhairedindian]

Originally Posted by MrPbody

Will,

That 914 casting is pretty rare. What is the two-letter code stamped into the front, pass side, just below the deck? What is the date code? That's found on the back, next to the distributor hole. Same pattern for date codes as Chevy.

The 94s are used on occasion when a 455 is employed, needing a larger chamber volume to decrease compression for use with today's 93 octane gas. It should be noted, these heads are not "performance' heads from the factory. They can, however, be modified to be as good as any other "d-port" Pontiac head.

Sounds to me like someone threw something together to "work", without regard to performance.

First things first. Get Jim Hand's "How to Build Max-performance Pontiac V8s", published in 2004 by SA Designs. This is far and away, the most current (key word) study of the ol' Injun. In order to make educated decisions about your engine, you need to understand the rationale behind it. Building it in a similar manner you're accustom to with the small block, will result in a "turd" (won't get out of its own way) and in a short time, a pile of junk with rods hanging out of it. This is where the erroneous stigma of a grenade, looking for a place to explode, came from. Building to the strength of the Pontiac will result in among the very best street-performance engines out there of ANY brand. This is no reflection on the small block, good OR bad. It's just a different animal and must be approached as such.

Welcome to the more sophisticated "side" of GM muscle cars! (GTO did NOT earn a reputation for LOSING...)

Jim

First of all Thanks Jim,On the front of the block there is a YD/95 and on the back by the distributor is a Big 70. Does this info help me more? And i will look for Jim's book.Thanks.Will