383 Stroker Questions

[par4tom]

Motorhead...I don't know which is more expensive...the truck or the divorce! At least the truck is fun! Can't say the same for divorce!

Thanks for the comments.

I did some follow up with the engine shop...turns out my L48 block is not going to work with the Stroker kit due to the main bearing journals not being bored out straight enough...by the time I'm done on this project, the only thing left on this truck that is original will be ME!

I also checked into the "Chinese Heads" issues...turns out the blank heads do come from overseas, but all the final grinding, fit and assembly are done in Bakersfield. Owner says he has sold and installed these heads for years and for the buck, there is no bigger bang out there. He swears the quality is really, really good and serious overkill for someone who is just going to be using it for the street!

I chose the 2.02 valve configuration with the 1.6 roller tipped rockers. Cam is from Lunati and has 465 and 488 lift, with 290 and 300 duration. Going with hydraulic flat tappet lifters. Looking for good streetable power from the stop light and a lot of low end torque. Not going to go racing...I have a 4 speed manual (NP440/MY6) with Captain Fab's brake booster bracket and hydraulic clutch set up! 3.73 rear end with posi. I'll probably have to do some work on this too!


Anybody else use this Lunati cam set up? I understand the 1.6 rocker arms will pickup the lift and duration a bit. I am WAY out of my element when it comes to stuff like this. Will the 670 Street Avenger from Holley still work?

[DURG]

I have the 670 Avenger on a 383 in my 62 Impala SS Lunati cam with around 480 lift. Runs fine. All the carb cfm calculators came out around 700 cfm figuring on only turning 5500 RPM and many articles recommended stepping down instead of up on carb size. I just bought a GM Performance fast burn 385 383 stroker for my truck and it has a 750 cfm carb so I think anything from 650 to 750 would be useable with a tune unless you plan on wringing it out to redline then step up to the 700 something cfm carb.

[Captainfab]

If the block is otherwise good, why not have it line honed? Finding another block that is perfectly straight is going to be hit and miss.

If you're set on finding another block, try and get a '96-'02 Vortec block. That way you can run the factory style roller cam, which is a bit cheaper than a retrofit roller cam.

Originally Posted by par4tom

I did some follow up with the engine shop...turns out my L48 block is not going to work with the Stroker kit due to the main bearing journals not being bored out straight enough.

[scottofksu]

Originally Posted by Captainfab

If you're set on finding another block, try and get a '96-'02 Vortec block. That way you can run the factory style roller cam, which is a bit cheaper than a retrofit roller cam.

X2

Some light reading for you, though, it is in a different direction than you're currently going:

http://www.classictrucks.com/tech/10...d/viewall.html

[par4tom]

Cap,
He gave me that option. He also said he'd have to bore it 60 over. The owner said he had another block that had already been decked, bored 20 over and was pretty much ready to go. Charged me 200 bucks for the block. I ll put the original L48 back together as I have all the parts and either keep it as a backup or sell it on Craigslist.
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