need some oem specs....454

[Paulster2]

I'd venture to assume this is a truck block which has a larger deck height (10.4" vs 9.8" I think?? Been trying to look it up online, but Internet is slow at work, lol!) This makes a difference in the intake and headers you are looking to purchase. The intake has to be wider than the passanger block intake would be (or you have to use spacers). The headers will sit higher as well, so need to be a bit longer for body fitment. Luckily both options are easy to come by, it's just you have to plan for them. All internals and bolt patterns are the same. You'll also need to consider this for the front mounting brackets for anything mounting off the heads (alternator comes to mind) as it's a little different. Just thought I'd mention.

[pl4yboy]

I'd venture to assume this is a truck block which has a larger deck height (10.4" vs 9.8" I think?? Been trying to look it up online, but Internet is slow at work, lol!) This makes a difference in the intake and headers you are looking to purchase. The intake has to be wider than the passanger block intake would be (or you have to use spacers). The headers will sit higher as well, so need to be a bit longer for body fitment. Luckily both options are easy to come by, it's just you have to plan for them. All internals and bolt patterns are the same. You'll also need to consider this for the front mounting brackets for anything mounting off the heads (alternator comes to mind) as it's a little different. Just thought I'd mention.

The intakes are interchangeable without spacers.

[Duct_tape123]

Mill/deck to bring compression up, work the heads, good exhaust, good ignition system, then add boost if you're not happy with the results naturally aspirated. And make sure its carbureted.