Looking for a chevy 407 cu. in. engine.

[jmelliott]

I am looking for a chevy 407 cubic inch engine.......I believe they may have come out in the 68 or 69 ss novas..........can anyone help me or point me in the correct position?????

[Sky]

dont know were there is a 407 but i know were there is a 425, they say it is already rebuilt but unfortunatly, they want to sell the whole pickup truck with it. i think there asking 7000 for the whole kit & kaboodle. i know were it sets.

[oldironcollector]

Chevy made a 307 and a 402, no 407. Might try searching the web for automobile engines.

Denny

[Bill Sherlock]

Do you mean 409? Beach Boys had a song about a 409 back in the 60's.

Bill

[Tom Cwach]

In 1968-1969 SS Novas you could get a 350 small block or a 396 big block. Standard novas also came with 4 cyl 153, Six cyl 250,or 307 v8. In 1970 the 396 big block became a 402 but was still advertised as a 396 in some cars. The 402 small block came out in full sized cars in 1970 and were called 400s. The 402s are bored out during rebuilds .030" and are refered to as 406 or 407s. These are a bolt in for any Chevy V8 application so you may have seen one in a Nova. 402 small blocks were in chevy cars and chevy and GMC pickups from 1970 until the early 1980s. The 402 small blocks have three frost plugs in the side of the block or two frost plugs and an unmachined raised boss on later models. 350 and smaller have two frost plugs on the sides. Might find one in a salvage yard or in a big car in someones backyard.

[Phillip Hutchinson]

g'day
a m8 out here has one in a speed boat and it goes like clappers

[Jordan]

Originally Posted by Bill Sherlock

Do you mean 409? Beach Boys had a song about a 409 back in the 60's.

Bill

In The 1960's some impalas were featured with a 409 but today these are rare birds

[KidDynamo]

I wonder if he means a 427 or maybe a 307. Both were made but the 427 will cost you.

[Steve Kreiner]

Chevy did make a 402 big block engine. If I remember right a old friend of mine had one in an 58 chevy.

[jmelliott]

Originally Posted by Tom Cwach

In 1968-1969 SS Novas you could get a 350 small block or a 396 big block. Standard novas also came with 4 cyl 153, Six cyl 250,or 307 v8. In 1970 the 396 big block became a 402 but was still advertised as a 396 in some cars. The 402 small block came out in full sized cars in 1970 and were called 400s. The 402s are bored out during rebuilds .030" and are refered to as 406 or 407s. These are a bolt in for any Chevy V8 application so you may have seen one in a Nova. 402 small blocks were in chevy cars and chevy and GMC pickups from 1970 until the early 1980s. The 402 small blocks have three frost plugs in the side of the block or two frost plugs and an unmachined raised boss on later models. 350 and smaller have two frost plugs on the sides. Might find one in a salvage yard or in a big car in someones backyard.

I think you are correct on that.........the 402 small block bored out would make the 407..........and the friend of mine that is looking for it may not know that........but he swears it was a 407.........but I couldn't remember a 407, persay.............only the 402..........and the nova I think I saw did start with a 402 block...................

[Marty Riffle]

Hi Guys Never heard of a 402 Small Block. The 400 was a small block. The big blocks were 396 402 427 454. The 402 was a factory bored 396 .030 over. Small blocks came in 283 307 327 350 400. The 409 and 348 were different all together. What I remember is a 400 bored .030 over made a 406. It's been 25 plus years since I was drag racing. that what I remember.

Marty

[David OBrien]

There was one other small block Chevy made for a very short time and it is quite rare and that would be the 302 made for the Camaro and Novas in 68 and 69 if I remember cor______ly.

[Neale Behm]

The 302 was the "Z-28" engine. If my last remaining braincell (I have kids) serves me it had different heads than other small block engines....referred to as "angle plug" with 2.02" intake valves.

Thanks Harry

[Tom Cwach]

I was typing before thinking again I was thinking the 400 small block and the 402 big block were the same bore and stoke. The small block is 4.125bore,3.75 stroke for 400.92 cu.in. 406.77 with .030 overbore. The big block 402 is 4.125 bore,3.76 stroke for 401.99 cu.in. 407.85 with .030 overbore,a 396 with .060 would be the same.

In the early 1970s Chevrolet confused the matter more when the small block was only offered with a two barrel carb. If you ordered a 400 two barrel engine you got a small block. If you ordered a 400 four barrel you got a big block in your car or pickup. Also in 1970 if you ordered a SS396 option on your Camaro,Nova,Chevelle you got a 402 engine. Before 1970 GM did not offer a engine larger than 400 cu.in in a mid sized car but some dealers could do it with a COPO order, So in 1970 the 396 recieved the bigger bore so it would share the same ring set as the new small block engine, a cost saving for Chevrolet.

The 302 was a Camaro option made to get the Camaro legal for Can-am road racing compition where they were limited to 5.0 litre production engines. I haven't heard of any Nova factory assembled with a 302. The 302 had 2.02 intake valves but the slant plug heads were a over the counter part not installed at the factory.

I have aways liked the big blocks. I had one 1970 Chevelle 350/4spd, The only small block I had besides one in a pickup. In 1978 I bought a 1969 Nova 375hp 396/4spd with 36,000 miles and survived driving it another 16,000 miles without crashing it. Drag raced and tractor pulled with big blocks too.

[David Scott]

302 was dicontinued because of a suit against GM by Ford. The aplication on the 402 smallblock was strickty marine all the engines in the cars were 400'S.
An ocassional 402 wound up out of a boat dicovered by a hotroder. Only new of one of these it was in a masda spider old style rear drive it was built to the hilt and turned high 8'S it in a smelter by now though came apart hard in a race. Haven't seen one sence.

David

[Joe McDuff]

I'm a Ford man, myself. But ebay happens to have a 409 bareblock and also, a pair of heads up for bid. They would be a real gamble, quality wise/price wise, to buy and assemble for a genuine 409. Don't believe you'll find a '407' perse, but with a whole bunch of machine time, anything is possible.

Good luck,

Jose

[HoMade]

Just for the fun of it, I'll see if I can recite the SB Chevys from memory, by size, not chronological order.

262
265
267
283
302
305
307
327
350
400

Big blocks

366 (trucks)
396
402
427 iron
427 aluminum
454
496 (late)

[BobRR]

Ho ya forgot 348&409 Just picked up a blown 340 4sp. 68 cuda BobRR

[HoMade]

Ah, but the 348 and 409 are members of neither the "small block" nor "big blocks" chevy family. They have their own distinct block design.

The 409 is based on the 348, but with significant difference besides bore ans stroke, main journal size to begine with.

The most obvious external difference between the 348/409 and the SB and BB is the shape of the head. Compare:

Here is 409, look at the valve covers:



This is whay they are sometime called "W" heads.

Here is a SB and BB for comparison:

327 SB



454 BB

[Tom Cwach]

The 348 and 409 are big blocks. They are the Mark I engines.

The Mark II engine was a three valve per cyl.,two intake one exhaust, expriemental test.

The Mark III is the 427 1963 Daytona mystery engine. The bottom end like a 409 with heads like the later production engines.

The Mark IV Engine is the production big block from 1965-1989.

The Mark V has a one piece rear seal and no feul pump boss on the block.

Mark VI is the Vortec. I don't know if the current 8.1 is still called a Mark series.

The Mark IV crankshaft can have the mains turned down and used in a 348/409 as a stroker crank.

In 1980 I got lucky and bought a 1962 Biscayne. 409/409 2x4 4spd. metalic brake linings car out of a cow pasture for $200.