In A Bind
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In A Bind
Hey guys, i know the first thing you're gonna tell me to do is search. But i need to get my truck on the road "yesterday" for work. Its an '81 ext. cab, longed with a 351m. All i need is for it to be reliable at 75-80mph highway, and non-egressive city driving. Anything with help, suggested rear ends, tire sizes, cam, lifter, rocker sizes, carb sizes, anything. thank you. Everything is stock by the way.
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From: O-O-O-Oreilly's
You likely have 4.10 gears, being that it is a 3/4 ton. Does your truck have a tach? As it sets now, your truck will be most comfortable cruising at 70mph max. Slightly larger tires will help a bit.
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pedant
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From: EXTREME southwest CT
1:1 in top and 4.10's = there's no way that truck is going to be comfortable (or safe) at 80mph.
Tires large enough to keep it around 3, 000 rpm are not going to fit in the wheel wells and will rub the frame in turns.
The 335 series engine *can* be built for horsepower and rpms but it won't be cheap or happen "yesterday".
Read some of GaryLewis' epic threads or go ask the question in the 335 section of the performance engines subforum.
I know you don't want to hear it but scrape some cash together and buy a more modern truck with an overdrive transmission.
The newer engine will be more happy at the higher revs you're asking of it.
Tires large enough to keep it around 3, 000 rpm are not going to fit in the wheel wells and will rub the frame in turns.
The 335 series engine *can* be built for horsepower and rpms but it won't be cheap or happen "yesterday".
Read some of GaryLewis' epic threads or go ask the question in the 335 section of the performance engines subforum.
I know you don't want to hear it but scrape some cash together and buy a more modern truck with an overdrive transmission.
The newer engine will be more happy at the higher revs you're asking of it.
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From: Denver Metro Area, CO
1:1 in top and 4.10's = there's no way that truck is going to be comfortable (or safe) at 80mph.
Tires large enough to keep it around 3, 000 rpm are not going to fit in the wheel wells and will rub the frame in turns.
The 335 series engine *can* be built for horsepower and rpms but it won't be cheap or happen "yesterday".
Read some of GaryLewis' epic threads or go ask the question in the 335 section of the performance engines subforum.
I know you don't want to hear it but scrape some cash together and buy a more modern truck with an overdrive transmission.
The newer engine will be more happy at the higher revs you're asking of it.
Tires large enough to keep it around 3, 000 rpm are not going to fit in the wheel wells and will rub the frame in turns.
The 335 series engine *can* be built for horsepower and rpms but it won't be cheap or happen "yesterday".
Read some of GaryLewis' epic threads or go ask the question in the 335 section of the performance engines subforum.
I know you don't want to hear it but scrape some cash together and buy a more modern truck with an overdrive transmission.
The newer engine will be more happy at the higher revs you're asking of it.
And something built during the Carter/Reagan era is by definition not going to be as reliable as something 30 years newer... plastic becomes brittle, rubber dry rots, electrical connections become corroded, TTB bushings and suspension joints wear out, parking brake cables rust together, frames crack, gas tank senders stop working, etc.
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