Where do i find a chart of acceptable results on here for the famous drill bit test?

I needed to dig up a block for Dale to fix his crunched headers. I found one that has me thinking. It must be the original C6ME-A 390 block from my 67 Ranchero. I recall it was burning oil and when i went to rebuild it the thing was already .060" over with a ridge. It ran fine and always ran cool like that.

The 7/32" drill bit is as big as passes between any two bores. 15/64" can't even be hammered through. My .030" over 1966 428 engine has it's frost plugs in it and i didn't want to pound them out to see what that measures.

Since it's already 4.13" or bigger at the top of the piston travel i'm thinking it's safe cutting the rest of the bore to that size and using a 428 crank and pistons.

actual chart but the drill bit test is in barry rabotnicks book.

he has the drill bit info

http://www.doveengineparts.com/tip_s_on_building_a_fe.html




edit ... looks like 4.16 bore is a good possibility from Dove's site

Remember this does not account for core shift, corrosion or actual bore ceterline. I've been rather surprised to find thicker walls on scorned 360's than any 428 I've run across so far.
This is as listed on Jim Dove's site.

If an allen wrench fits between the bore.......


SIZE



WRENCH SIZE
RESULTS

.375"
3/8"
No Good

.312"
5/16"
No Good

.281"
9/32"
4.080" Max

.218"
7/32"
4.160" Max

.187"
3/16"
4.18" Max (In a 406 or 428, Good Block)

.187"
3/16" (427)
4.293" (68 C8AZ-6010-G) .125''

.125"
1/8" (427)
4.310" (Marine Block & Some Early 427's)

That's the chart i'd seen. The walls don't appear to have any taper on the outside of the jacket. I'll risk it at 4.13".