86 Monte SS Build!
- Thread starter bulletholez
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AVS = Air Valve Secondary
That will work like you want. Look for some Vortec 7400 L29 454 heads, they have 98cc chambers to make decent compression (9.5 or so) like you are looking for....'96-2000 454 truck motors have them, you can find 'em around here for around $200 or so. The casting numbers are 10141279 and 12560241 they have full sized oval intake ports and a heart shaped combustion chamber.
The other option is 396/402 heads, slap em on the 454 with some rings and bearings and run it. On the cheap until everything lines up budget wise.
The 200R4 from a Monte SS is the best to start with, my buddy has one in a 1965 GS Buick with a 455 and 3.42 gears....working like a champ!
I know you said aluminum heads, Edelbrock does offer some hat have been angle milled for use on flat top 454s that would be awesome. But, if you are going solid roller....hard to beat some big old square ports and big dome pistons!
That will work like you want. Look for some Vortec 7400 L29 454 heads, they have 98cc chambers to make decent compression (9.5 or so) like you are looking for....'96-2000 454 truck motors have them, you can find 'em around here for around $200 or so. The casting numbers are 10141279 and 12560241 they have full sized oval intake ports and a heart shaped combustion chamber.
The other option is 396/402 heads, slap em on the 454 with some rings and bearings and run it. On the cheap until everything lines up budget wise.
The 200R4 from a Monte SS is the best to start with, my buddy has one in a 1965 GS Buick with a 455 and 3.42 gears....working like a champ!
I know you said aluminum heads, Edelbrock does offer some hat have been angle milled for use on flat top 454s that would be awesome. But, if you are going solid roller....hard to beat some big old square ports and big dome pistons!
AVS = adjustable valve secondary, it's definitely mechanical, but i appreciate the info on the heads!!! ill have to look into that for sure as i wouldn't mind getting a couple extra points of compression out of it on the cheap and i know the combustion chambers on the vortec heads are a much better design.
Either way, the carb still works sorta like a vacuum secondary in that the upper valve over the secondaries is drawn open by engine, AFB and Q-jets work in a similar fashion. The cool part, that one has a spring you adjust tension on like a Q-jet where the AFB you had to alter the counter weight.
Good score!
Good score!
Looks like a great car and engine to start with. I'll make one recommendation, save the money to buy a roller cam, link bar lifters and springs for two reasons - it is the easiest way to add HP and torque without pushing the compression into unfriendly pump gas territory, and BBC's are THE toughest motor to keep from eating up FT lobes and lifters. You mentioned you want to put it together and not tear it back apart - FT cam in BBC doesn't imply that to me. You should be able to find a Howard's kit and springs for about $700, it will be money well spent.
I did look into that, and while i would love to, budget for now isn't going to allow me to spend $700 on a roller cam setup unfortunately since $700 is more than i planned on spending on this motor completely as it is.
I personally will not run another flat tappet cam in anything I build but I can see being on a budget having to go this route because the money is simply not there.
The problem with being on a tight budget and going with a roller cam now is a cam that will make decent power in this mild application is not going to be an ideal cam when you later build your aluminum headed 496-505 which will not only require a larger cam but carb and intake upgrades as well.
The good thing though is you don't need new lifters to do a roller cam upgrade so it is just the cost of the new cam.
The problem with being on a tight budget and going with a roller cam now is a cam that will make decent power in this mild application is not going to be an ideal cam when you later build your aluminum headed 496-505 which will not only require a larger cam but carb and intake upgrades as well.
The good thing though is you don't need new lifters to do a roller cam upgrade so it is just the cost of the new cam.
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