Gear Vendors Overdrive in a 1978 NYB

[Kip Gardiner]

I have two 78 NYB's and one had a 400. I wanted to rebuild them both but the cost to build a 400 is the same as a 440 so I started looking for a 440 in a basket to rebuild and then I'd have both cars with 440's under the hood.

I found a kid on Kijii that had a short block 440 bored 0.030" over and he said he had removed the brand new sealed power aluminum pistons. I asked why and he said he had it in his drive shed and water got into it and some cylinder walls got damaged. I bought it anyway and took it to Windsor and my late uncle Marvin did the machine work. Turned out two cylinders were pitted so he bored them two, installed two sleeves and then bored the sleeves 0.030" oversize so he could use the pistons then decked the block. The heads were 906 castings and the steel crank is internally balanced. I know some of you guys don't like photobucket but it's the best link I have to pics of the machine work.

440 Rebuild by Kip Gardiner

440 Starting Work by Kip Gardiner

 

[cantflip]

I have two 78 NYB's and one had a 400. I wanted to rebuild them both but the cost to build a 400 is the same as a 440 so I started looking for a 440 in a basket to rebuild and then I'd have both cars with 440's under the hood.

I found a kid on Kijii that had a short block 440 bored 0.030" over and he said he had removed the brand new sealed power aluminum pistons. I asked why and he said he had it in his drive shed and water got into it and some cylinder walls got damaged. I bought it anyway and took it to Windsor and my late uncle Marvin did the machine work. Turned out two cylinders were pitted so he bored them two, installed two sleeves and then bored the sleeves 0.030" oversize so he could use the pistons then decked the block. The heads were 906 castings and the steel crank is internally balanced. I know some of you guys don't like photobucket but it's the best link I have to pics of the machine work.

440 Rebuild by Kip Gardiner

440 Starting Work by Kip Gardiner

I'm giving credit for effort...

 

[330dTA]

Soo... how much power does it make? RWHP? 1/4 mile time?

It's nice to see someone put effort to an engine build, but to me at least it's always the numbers which tell if it was worth it.

 

[Henrius]

Went to the SMR transmissions 727 shorty website. Information was pretty sketchy.

1. What actuates shifts into overdrive? Does it happen automatically?
2. Why does it say fits A and B model cars? Just didn't think to mention the bigger C's?
3. Has anyone here experienced better gas mileage on the highway, or is the only advantage just slowing revs down to reduce engine wear?

 

[twostick]

There is an optional controller that will shift it automatically.

The standard method is a floor switch similar to a dimmer switch or a shifter mounted switch to manually control it.

As for fuel mileage ultimately it all depends on the engine combo but the short answer is it should improve mileage.

C-body was left out because nobody has figured out yet that they are the next big thing.

Kevin

 

[twostick]

The Gearvendors site has lots of info.

Gear Vendors under/overdrive transmissions the most awarded auxiliary transmissions.

Kevin