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10-14-2009, 08:41 AM
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#1 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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What SBC with O/D?
I have a`91 3/4t 4wd Suburban that I`d like to use a`71 350 in.The Suburban has 4.10s,4L80E,12.50/35 MTRs,and a 6.2 diesel.The 350 is from a`71 c/20 and coupled with the TH350 still.
I`m wanting opinions on how to build the motor for this combo.I want optimum hiway performance in o/d.I guess a broad torque band.The gears will help the bottom end.I am after all the mileage I can get.I plan to use a spread bore. Do I go right to a 383?355?350?Stock compression/higher?I want a motor that is in it`s sweet spot in o/d in a heavy vehicle.I`d go to a smaller motor,but am I asking too much with the tires/gears/od?A higher rpm smaller V8?A 292?I don`t need to fly,either.I guess I want to limit it to using this 350 I have. 
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ Last edited by special-K; 10-14-2009 at 08:48 AM. |
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10-15-2009, 06:48 AM
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#2 |
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Special Order
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: What SBC with O/D?
Ok...how would you build a`71 truck 350 for the Suburban w/4.10s and o/d for a good hiway hauler?
It did good with the 135hp 6.2 diesel.I imagine a stock build would feel great.It has 3" pipes all the way out with 6" round Dynamaxs.I guess an RV cam,headers,quadrajet,HEI...
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ Last edited by special-K; 10-15-2009 at 06:54 AM. |
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10-15-2009, 12:02 PM
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#3 |
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Registered User
 
Join Date: Jan 2007
Location: Central Coast California
Posts: 1,026
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Re: What SBC with O/D?
Off topic...
How's the ride with the 6.2? i.e. How's the noise level and vibration?
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1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold  1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!!  1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) 2003 K2500HD 8.1/Allison1000/NP263
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10-15-2009, 12:53 PM
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#4 |
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Special Order
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Re: What SBC with O/D?
Not too bad.It just hums along at 70-80. No problem with 65,
__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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