318 LA Rebuild Advice
I am in the process of rebuilding a 318 LA from a 1982 Dodge W150 4x4. All appears to be completely stock except for the cam, intake and carb. This will be my first time ever going this deep into an old block, so I am asking this community for any pointers/advice/thumbs up on my part selection. The truck will be a daily driver with highway usage, light duty and light off-road travel.
In addition, my father replaced the camshaft some 5-6 years ago with a Sealed Power CS-645 Duration@ .050 (Int/Exh): 181/192 ;Gross Valve Lift (Int/Exh): .351/.400 ;LSA/ICL 109/110 - stock replacement that is no longer available. I would like to wake up the engine a bit with a Lunati High Efficiency or the factory performance that is a version of the 340 c.i.
- Keep in mind this a California vehicle so I will have to perform bi-annual emission tests - air pump, egr valve, vapor canisters.
Wheel + tire size = 30" tall
Rear diff. = 9.25" with 3.21 sure-grip
Transmission = A-727 with stock converter
- All hydraulic flat tappet -
#10201002 LUN - Advertised Duration (Int/Exh): 298/308 ;Duration @ .050 (Int/Exh): 232/242 ;Gross Valve Lift (Int/Exh): .462/.473 ;LSA/ICL: 112/112 ;Valve Lash (Int/Exh): Hyd/Hyd ;RPM Range: 2500-6500
#10200206 LUN - Advertised Duration (Int/Exh): 268/268 ;Duration @ .050 (Int/Exh): 218/218 ;Gross Valve Lift (Int/Exh): .457/.457 ;LSA/ICL: 110 ;Valve Lash (Int/Exh): Hyd/Hyd ;RPM Range: 1500-5300
# 10200260 LUN - Advertised Duration (Int/Exh): 253/265 ;Duration @ .050 (Int/Exh): 204/216 ;Gross Valve Lift (Int/Exh): .427/.454 ;LSA/ICL: 112/107 ;Valve Lash (Int/Exh): Hyd/Hyd ;RPM Range: 1500-4500
- Cylinder heads are #4027163 and I would like to do some port and polishing to remove the cast flashing.
- NEW intake manifold - Edelbrock 3776
- NEW Holley 4175 Carburetor 0-80555c
- Looking at Federal Mogul 205717M-000 kit (Assuming I have the standard 3.910 bore, will get a dial bore gauge)
- Maybe new valve springs?
- Looking to re-use factory rockers
- NEW Milodon Brass Freeze plug kit - 34040
My biggest concern is the camshaft. I don't care so much for HP gains and all, I just want the engine to flow a lot better. So wondering whether or not a small upgrade will doom me in emission testing...as far as I know the Tech just sticks the sniffer in your hole (much like just existing in this sate) at idle and then at a sustained RPM level.
I am in the process of rebuilding a 318 LA from a 1982 Dodge W150 4x4. All appears to be completely stock except for the cam, intake and carb. This will be my first time ever going this deep into an old block, so I am asking this community for any pointers/advice/thumbs up on my part selection. The truck will be a daily driver with highway usage, light duty and light off-road travel.
In addition, my father replaced the camshaft some 5-6 years ago with a Sealed Power CS-645 Duration@ .050 (Int/Exh): 181/192 ;Gross Valve Lift (Int/Exh): .351/.400 ;LSA/ICL 109/110 - stock replacement that is no longer available. I would like to wake up the engine a bit with a Lunati High Efficiency or the factory performance that is a version of the 340 c.i.
- Keep in mind this a California vehicle so I will have to perform bi-annual emission tests - air pump, egr valve, vapor canisters.
Wheel + tire size = 30" tall
Rear diff. = 9.25" with 3.21 sure-grip
Transmission = A-727 with stock converter
- All hydraulic flat tappet -
#10201002 LUN - Advertised Duration (Int/Exh): 298/308 ;Duration @ .050 (Int/Exh): 232/242 ;Gross Valve Lift (Int/Exh): .462/.473 ;LSA/ICL: 112/112 ;Valve Lash (Int/Exh): Hyd/Hyd ;RPM Range: 2500-6500
#10200206 LUN - Advertised Duration (Int/Exh): 268/268 ;Duration @ .050 (Int/Exh): 218/218 ;Gross Valve Lift (Int/Exh): .457/.457 ;LSA/ICL: 110 ;Valve Lash (Int/Exh): Hyd/Hyd ;RPM Range: 1500-5300
# 10200260 LUN - Advertised Duration (Int/Exh): 253/265 ;Duration @ .050 (Int/Exh): 204/216 ;Gross Valve Lift (Int/Exh): .427/.454 ;LSA/ICL: 112/107 ;Valve Lash (Int/Exh): Hyd/Hyd ;RPM Range: 1500-4500
- Cylinder heads are #4027163 and I would like to do some port and polishing to remove the cast flashing.
- NEW intake manifold - Edelbrock 3776
- NEW Holley 4175 Carburetor 0-80555c
- Looking at Federal Mogul 205717M-000 kit (Assuming I have the standard 3.910 bore, will get a dial bore gauge)
- Maybe new valve springs?
- Looking to re-use factory rockers
- NEW Milodon Brass Freeze plug kit - 34040
My biggest concern is the camshaft. I don't care so much for HP gains and all, I just want the engine to flow a lot better. So wondering whether or not a small upgrade will doom me in emission testing...as far as I know the Tech just sticks the sniffer in your hole (much like just existing in this sate) at idle and then at a sustained RPM level.