Main bearing interchange

[Roverbeam]

I'm putting a Buick 300 crank in a Rover 4.0 block. The crank is getting ground -.010 or -.020 to clean up some scoring.

The engine machinist really prefers tri-metal bearings over bi-metal. I can get Buick undersized bearings (Clevite MS 961P in -10 or -20), or just stock Rover oem-style ones from the usual Rover sources.

Do the Buick bearings fit the Rover block, ie same widths? With crank and block at two separate machinists, I'm trying to play go-between...

[mgb260]

Chad, This article is helpful. There are undersized Rover 4.0/4.6 main bearings available from D&D now.
http://www.britishv8.org/Articles/Affordable-Stroker-V8.htm

[Roverbeam]

Thank you Jim! I have seen a different version of that article on the Aluminum V8 site, but I don't recall its specific mention of the main bearing differences.

My engine guy/machinist is reluctant to line bore, since it's a half-aluminum, half-iron project that's easy to screw up. Since that article was written, there are now several suppliers of undersize Rover bearings, but they're all oem style, bi-metal 'hard' bearings. Engine guy likes tri-metal, soft bearings. So I'm kinda stuck between two conflicting choices!

I'll try to have a chat with him Monday and sort it out.

[mgb260]

Chad, You will also need D&D 300 crank rear seal adapter and special flywheel. Years ago Phil Baker used a Chevy Nova flywheel that was dished.

[Roverbeam]

Got 'em already. ;-)