For a stock late 90’s sb Magnum head.

Does anyone know off hand which tool I buy to cut the valve guides down to increase retainer to guide clearance?
Got a link?

I think it resizes for pc seals also.
thanks

Summit would have it. I bought tools to open valve pockets there. Best to call their tech line if you aren’t sure

Ask Cab_Burge on here, im pretty sure at one time he posted the site where he gets his and although I forget its the same one I have, its about 85$.

Thank you guys.
Assuming the magnum has the 5/16 balve guide.

I just picked up a 5.9 tonight and will definitely be going with bigger cam.

I bought all of the tools I needed and seals from Goodson to do all the early BB, SB and 426 Hemi Mopar motors along with a couple of the 11/32 guide to work on the after market BB aluminum heads with those size guides along with the spring pocket cutters also

Goodson is great to deal with.

Yes they are. NEVER an issue with them.

The cutter trims the valve guide and cuts the guide OD for the seal of your choice. You should know the OD your preferred seal requires before you buy the cutter. For me it was 0.625 so I could use stock late LA valve seals.

If the cutter is any good it'll have carbide cutting tips. Actually I've never seen one that didn't. These stay sharp a long time but crack easily. I dropped the cutter attached to the pilot which slid down the valve guide. The cutter cracked, part broke off. So now when I cut down a guide there is a little 1/32" thick cylinder of the original guide that I have to trim off with a grinder.

R.