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Old 02-12-2019, 12:39 AM   #6
OldCreek
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Join Date: Jan 2007
Location: Central Coast California
Posts: 1,026
Re: Enginge/Trans opinions

I did the LS/4l60e swap. But....

Because its not a daily driver I've come to realize the LS and Overdrive tranny aren't really necessary. What do I care what mileage I get? Even with the LS and overdrive tranny I still only get about 12mpg....top off, 4" lift, 35" tires and 4.11 gearing (4.56 would probably be better.) What's the overdrive doing for me? Not much I figure.

Don't get me wrong. It's a cool thing to have and show people the swap. But it's not a must.

A really clean engine compartment with a carbed 350 or 454 would be just as cool!

If I were to do it again.... probably a 454 (or 383 for easy tranny mating.)

Keep the th350 or get a 700r and buy a cheap ($50) adapter to mate it to the np205. I like cruising and saving the work from shifting.

Wil
__________________
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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