2.0 exhaust bolt stud size are 2.0's bigger than 1.7/1.8's?, i.e. 8mm x 1.25 vrs. 10mm x 1.5 Options

[orange914]

heres the newest encounter.

i'm ready to install the heat exchangers, but the heads i have do not have exhaust studs. no problem right? i measure my 1.7... roughly 2" long 8mm x 1.25. i get 8 studs and am all set to install. nope too big. check the hole it's a 10mm x 1.5. o.k. thats all good maybe 2.0 got a bit more h.d. then i look at the h.e. (1.7/1.8 s/s) and check the fit into the flanges. barely fit and might work but only if the alignment is exact to to heads (no room for out of align stud variance).

the heads are a vary well done set from LN i bought from jake so i'm sure nothing hoki was done. if in fact 2.o heads had the same size studs as 1.7/1.8 then i expect the theads were stripped and retapped to a larger 10mm.

i'm thinking to tap and heli coil to the 8mm size... what doeth ye all say?

mike