[dmielhausen]

Just a quick question; if I want to install a 1978 302 crankshaft into a 1987 5.0L roller block, aside from having to use the 28oz. imbalance equipment, is there anything else I have to do? I've heard that it is necessary to machined off the lip on the rear main seal journal....is this true? It seems like there will be ample clearance in the 87 block and main cap for the lip on the older crankshaft.

 

[gork1rogues]

Need to machine the lip off so you can use the one piece rear main seal that the 87 block is designed for.

 

[tonys10sec306]

it has to be milled off to you crank

 

[dfree383]

I though they swaped??????? Block is different, but cranks interchange?

 

[igo1090]

2 pc rear internal rear main seal vs 1 piece external rear main seal.

 

[dmielhausen]

Found out the scoop; the lip has to be ground off in order for the crank to fit in the block properly. It really has nothing to do with the seal as it doesn't sit as far back on the journal as the lip is located.

<font size=-1>[ This Message was edited by: dmielhausen on 5/5/06 4:36am ]</font>

 

[mavman]

Just grind off the lip. That's it...everything else will work.

I just either use a bench grinder or an old block with a couple bearings....and have someone spin the crank in the block while I use a angle grinder to grind down the lip. You don't have to take it all the way off. Just grind it down about halfway and you're done.

 

[dmielhausen]

It was only $30 at the machine shop. Besides, I don't want to introduce a balance problem; no matter how slight. I guess if you could rig/jig it up right, it might be OK.