454 for my 1986 Chevy c60

[IrishGun]

Hello,
I'm new to the world of big trucks. Recently purchased an 86' chevy c60 with the 7.0 427 in it. I am replacing that motor with a 454. Should this be better for towing my equipment? Also, it has a 5 speed Clark trans with a 2 speed rear end. By the way, I love this truck.

 

[warrpath4x4]

what is wrong with the 427?

 

[IrishGun]

what is wrong with the 427?

Cylinders filling with coolant. Three cylinders has very low compression.

 

[diesel4me]

The 454 has a longer stroke that the 427,which will help low end torque...

If the original 427 was a tall block version,its a heavier "truck duty" engine that likely has 4 rings on each piston rather than 3,(which is why the block needs to be slightly taller than "regular" big blocks..the 366 engine also has 4 rings on the pistons..

The 427 will hold up under high RPMS longer, having a shorter stroke than a 454...there are some other differences between a tall deck big block and a regular big block,some things wont interchange,like pistons,the distributor is "taller" ,and some had gear driven cams that are reverse rotation compared to engines using a timing chain (but the cam & lifters and timing chain can be swapped in place of a gear drive one,though I'd prefer gears)..

I would keep the 427 and rebuild it while your using the truck with the 454...a 427 is tough to come by,the truck tall deck ones do show up more often in salvage yards in bigger trucks like yours and school busses ,the passgenger car versions are getting scarce...

 

[IrishGun]

The 454 has a longer stroke that the 427,which will help low end torque...

If the original 427 was a tall block version,its a heavier "truck duty" engine that likely has 4 rings on each piston rather than 3,(which is why the block needs to be slightly taller than "regular" big blocks..the 366 engine also has 4 rings on the pistons..

The 427 will hold up under high RPMS longer, having a shorter stroke than a 454...there are some other differences between a tall deck big block and a regular big block,some things wont interchange,like pistons,the distributor is "taller" ,and some had gear driven cams that are reverse rotation compared to engines using a timing chain (but the cam & lifters and timing chain can be swapped in place of a gear drive one,though I'd prefer gears)..

I would keep the 427 and rebuild it while your using the truck with the 454...a 427 is tough to come by,the truck tall deck ones do show up more often in salvage yards in bigger trucks like yours and school busses ,the passgenger car versions are getting scarce...

The 454 has a longer stroke that the 427,which will help low end torque...

If the original 427 was a tall block version,its a heavier "truck duty" engine that likely has 4 rings on each piston rather than 3,(which is why the block needs to be slightly taller than "regular" big blocks..the 366 engine also has 4 rings on the pistons..

The 427 will hold up under high RPMS longer, having a shorter stroke than a 454...there are some other differences between a tall deck big block and a regular big block,some things wont interchange,like pistons,the distributor is "taller" ,and some had gear driven cams that are reverse rotation compared to engines using a timing chain (but the cam & lifters and timing chain can be swapped in place of a gear drive one,though I'd prefer gears)..

I would keep the 427 and rebuild it while your using the truck with the 454...a 427 is tough to come by,the truck tall deck ones do show up more often in salvage yards in bigger trucks like yours and school busses ,the passgenger car versions are getting scarce...

That's what I am considering. I think dropping in a 454 while I get the 427 rebuilt is my best option. It would be nice to have a backup motor.