Chevrolet engine designations
Does anyone know how GM decides on their RPO codes for engines? The reason i'm wondering is because i did some looking and it turns out the LT1 could come in a 260HP flavor with 2bolts and iron heads (impala SS/9C1), a 300HP or 275hp with 2bolts and aluminum heads(camaro), or as a 3xxHP or 275HP with 4bolts and aluminum heads (Vette), plus MANY other HP ratings and variations.
I also saw the new Z06 Corvette motor (348 CID/406HP) is designated as the LS6 as was the 450 HP 454 the put into some Chevelles in 1971. . .
Do they just pick random numbers and say "this is the order code", or is there some logic to it?
1985 Ford F-150 ex 4x2
NOW: 300-6, D44, spooled 9", T-18, twin stick NP205
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Just your average 18 year old. . .