Hi,

I am building a modified pro-touring 67 Chevelle with a big block. I have just installed the engine and trans and would like to set the engine back approximately 1" to make the oil pan and headers fit better. Does anyone know of plates that that can be purchased that will set back my motor mounts 1"? Any help would be greatly appreciate. THANKS!

John

using a hoist, unload the motor weight from the frame, unbolt the frame stands, move back 1", drill new holes, lower engine, rebolt to frame, stand back and admire.

you might also be able to flip the frame stands from side to side and drill one new hole in the stand. i think it moved my engine back about 2" though.

Tim

Wouldn't it be easier to modify the front crossmember?

I know moving the engine back has advantages and disadvantages.
but in this case, I don't think weight distribution is a major factor as the motor is a BBC.

I'm not positive but moving the engine back an inch might affect the driveshaft length, clutch linkage? shifter hole/linkage?, less space in trans tunnel(PITA to remove trans)

Wouldn't it be easier to modify the front crossmember?

I know moving the engine back has advantages and disadvantages.
but in this case, I don't think weight distribution is a major factor as the motor is a BBC.

I'm not positive but moving the engine back an inch might affect the driveshaft length, clutch linkage? shifter hole/linkage?, less space in trans tunnel(PITA to remove trans)
Drilling a few holes for the stands is MUCH easier than modifying the X-member!. Besides, if you modify the crossmember, it could possibly weaken it.

Since it IS a BBC then the weight IS a factor! I say move it back if you can. Like others stated, you may end up with trans tunnel clearance issues, but these can be fixed by cutting some sheetmetal and welding, if needed.

I will affect the clutch linkage if you use mechanical, but not hydraulic.
You are probably going to have to modify/make a driveshaft anyway, so its probably not too much of an issue.

I think some adapter plates could be fabricated rather easy with some measuring, couple pieces of plate and a drill press. Lay out your holes on the plate from a motor mount. Then layout 3 more holes 1'' horizontally. If interference with the block or motor mount is an issue, you might have to countersink a hole or two. I don't know if anyone has every tried this before? Just a thought...

it has been done before, but drilling new holes and moving the stands back is MUCH easier.

Tim

I never have done either, so I wouldn't know which was easier. Sounds like he has a few options though.