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swb85 · 06-27-2007, 09:50 PM

No more Flinstone power for this swb!

Here’s the install, luckily my old man stopped by to help, it took some persuasion to get the motor in the mounts. The energy suspension poly inserts made for a VERY tight fit.

Here are the specs of the motor/drivetrain now:
-'69 L48 block, .030" over, zero decked, align honed
-Scat 9000 crank, 4130 forged 5.7" I-beam rods, speed pro 12cc dished pistons and moly ring pack
-ARP main cap bolts
-Comp XR282HR retro-fit hyd roller cam & lifters (cam doctored at 232/238 .544”/.555” with 1.6 rockers, 109 LSA)
-Pro Comp adjustable double roller timing set, billet gears
-10.4:1 static compression, 8.2:1 dynamic compression, .038” quench height
-906 Vortec iron heads, 3 angle valve job, 1.94/1.5 stainless valves, comp 918 beehive springs, ARP screw in studs and guideplates
-stainless 1.6 full roller rockers
-Comp magnum pushrods (7.266”)
-Edelbrock RPM Air Gap intake, port matched
-Edelbrock 1407 performer carb (750cfm)
-MSD streetfire HEI distributor & curve kit
-Taylor pro race 8mm wires
-Pro Comp high flow polished water pump
-ARP fasteners used wherever possible
-Wysco stainless longtubes, 1 5/8” primaries, 3” collectors
-3” custom mandrel bent dual exhaust (no crossover), flowmaster super 44 mufflers
-Centerforce 11” dual friction clutch
-M21 close ratio muncie 4 speed, hurst shifter
-3.42 rearend

I know some will ask---For those that are interested in what it costs to do something like this, the total for parts & machine work was $6300, but I parted out the original L48 on ebay and sold the old 355 in my truck, making the final tab right at $4500. The only parts reused from the 355 were the motor mounts, and I only re-used 1 bolt from the L48 (it’s holding the flywheel dust shield on, lol). Everything else is brand new.

And here's what you've all been waiting for......she's alive!!!!

Hope y’all enjoyed! I’ve got 175 miles on her now….still have 300 miles of breaking in the clutch before I can see what she’s really got, but lemme tell ya---it pulls HARD. On paper it should be over 450hp and creeping up on 500ft lbs. Less than half throttle up to 3k rpm is smoking that poor right rear tire already. Traction bars, better tires and hopefully a posi are next on the list!!
As soon as everything is broken in, I’ll post a clip of me bangin’ through the gears!

06-27-2007, 09:50 PM	#6
swb85 On a budget like Fred Sanford Join Date: Oct 2005 Location: Topeka, KS Posts: 2,031	Re: It's 383 time!!!!! No more Flinstone power for this swb! Here’s the install, luckily my old man stopped by to help, it took some persuasion to get the motor in the mounts. The energy suspension poly inserts made for a VERY tight fit. Here are the specs of the motor/drivetrain now: -'69 L48 block, .030" over, zero decked, align honed -Scat 9000 crank, 4130 forged 5.7" I-beam rods, speed pro 12cc dished pistons and moly ring pack -ARP main cap bolts -Comp XR282HR retro-fit hyd roller cam & lifters (cam doctored at 232/238 .544”/.555” with 1.6 rockers, 109 LSA) -Pro Comp adjustable double roller timing set, billet gears -10.4:1 static compression, 8.2:1 dynamic compression, .038” quench height -906 Vortec iron heads, 3 angle valve job, 1.94/1.5 stainless valves, comp 918 beehive springs, ARP screw in studs and guideplates -stainless 1.6 full roller rockers -Comp magnum pushrods (7.266”) -Edelbrock RPM Air Gap intake, port matched -Edelbrock 1407 performer carb (750cfm) -MSD streetfire HEI distributor & curve kit -Taylor pro race 8mm wires -Pro Comp high flow polished water pump -ARP fasteners used wherever possible -Wysco stainless longtubes, 1 5/8” primaries, 3” collectors -3” custom mandrel bent dual exhaust (no crossover), flowmaster super 44 mufflers -Centerforce 11” dual friction clutch -M21 close ratio muncie 4 speed, hurst shifter -3.42 rearend I know some will ask---For those that are interested in what it costs to do something like this, the total for parts & machine work was $6300, but I parted out the original L48 on ebay and sold the old 355 in my truck, making the final tab right at $4500. The only parts reused from the 355 were the motor mounts, and I only re-used 1 bolt from the L48 (it’s holding the flywheel dust shield on, lol). Everything else is brand new. And here's what you've all been waiting for......she's alive!!!! Hope y’all enjoyed! I’ve got 175 miles on her now….still have 300 miles of breaking in the clutch before I can see what she’s really got, but lemme tell ya---it pulls HARD. On paper it should be over 450hp and creeping up on 500ft lbs. Less than half throttle up to 3k rpm is smoking that poor right rear tire already. Traction bars, better tires and hopefully a posi are next on the list!! As soon as everything is broken in, I’ll post a clip of me bangin’ through the gears! __________________ '85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD Last edited by swb85; 06-29-2007 at 09:37 AM.