swapping to a V8 (same old questions)

[dubie]

Just a couple questions. A customer of mine has a 350, 4 bolt that he is willing to give me. The engine ran 3 years ago when he yanked it out of his truck to drop in a 455. I want to know exactly what has to be replaced when you go to a V8 from an inline. I know that I can drop it right on the inline engine stands, but what else needs to be done to have a succesful install? And, If I was to get the V8 stands and switch to a 4spd, what would need to be done? Thanks for any advice guys.

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72 C/10 LWB 2wd
250 inline 6, 3 speed column shift. Soon to have a total facelift.

[69 longhorn]

You can drop it right in on the 250 stands,an HEI dist will fit,but will be tight. On the front,you can run the late, long style waterpump & accessories,& a V8 shroud,or I have heard of guys using a 4 x4 shroud with the short pump. You will need all of the V8 clutch linkage,& use a screw in pivot ball in the foward hole in the block. The frame bracket will need to be moved & frame redrilled (set the bellcrank perpendicular to the block),& the lenght will need to be adjusted on the lower clutch arm. Set up like this,you can run the stock rams horns,or a set of 69090 headmans will fit. To change to a 4spd,you will need a high hump floor section,& the drive shaft lenght will be different(longer). To move to V8 position,you will need to move the bell crossmember......& im not sure that the crossmember is the same (I 6 to V8). You will move foward approx 3 1/2",so there will be drive shaft lenght issues. Good luck....69 longhorn.

[okietruck]

I just did part of this rebuild. Stuck a crate 350 into a 72 that had a straight 6. I used Heddman #69092, it is made for the standard tranny. I am looking into the 4-speed change-over next. Good luck

[69 longhorn]

okietruck,I used the 69090s on my swap. Were you mounted in 6 or v8 position? Where i mounted in I6 position,the bellcrank cleared the tubes,but the holes were redrilled in the frame for the bracket. Just curious,there are many ways to do the same job.......69 longhorn.

[dubie]

Thanks for the info. guys. Longhorn, do you happen to have pics from both sides of the engine you could post? I have heard that the distributor sits about 1/8" away from the firewall, and would like to see what yours looks like.

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72 C/10 LWB 2wd
250 inline 6, 3 speed column shift. Soon to have a total facelift.

[stelth2002]

Dubie, what are you going to do with the 250? If it has an HEI I would be interested in the distributor. Thanks

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67 Chevrolet LWB with rebuilt 292. 415 ft. lbs of torque, 4 speed, 3.73 Posi, straight and almost painted.

[69 longhorn]

Sorry Dubie,I dont have any good shots that will show the dist. It does fit tight,if the wires are off,I can slide my fingers (tight) between the cap & fire wall,but some of the wires do touch the firewall. As a thought,you could do a little hammer work on the firewall in that area.Good luck.....69 longhorn.

[dubie]

I would be selling the 250, but it doesn't have HEI. It is a stock 250 and the odometer reads 91,000 miles. I'm not sure if those are original or not, but it sure is a good motor. I am going to wait until i get this 350 apart to see what it needs, before I sell off my inline. I may just keep it as a rebuild project, not sure yet.

[70cst10]

If you want a 6cyl HEI, I have a spare I'll sell. email me if you're interested.

Milan

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milanplechata@hotmail.com

Lexington, SC

1968 c/10 lwb 250/3 on the tree
1970 CST/10 lwb no motor/trans
One bad 400sb waiting for a truck to call home..

http://communities.msn.com/6772GMTru...68longbed.msnw

Every man dies, but not every man truly lives..

[okietruck]

69 longhorn, I mounted in V8 position and had to get a new bell crank. The I6 bellcrank was too long. The 69092 was recommended where the #7 sparkplug is directly above the engine side ball. I suppose there were some differences over the years. The guys at Jegs said there was a note that the 69090 may have to be "modified" in some manual transmission applications. I put in one the new Goodwrench engines.

[69 longhorn]

okietruck,I was in 6 cyl position,but had v8 linkage. Looking at those 69090s,I could see a problem......the bellcrank would have to go through #7 tube! (in V8 position). I stuck the bellcrank in ahead of the #7& tube,& used a different pivot ball,& redrilled the holes fro the frame bracket.