Re: 4.0 questions

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: <mail@xxxxxxxxxxxx>
" 
" I plan to put a 258 bottom into it, any year
" suggestions. The 4.0 is an '87. What should I do to
" the bottom end? 
" Thanks all......Russ

there are pluses and minuses for any of the different 258 cranks.  a
serp belt one [used as early as '82] is easiest; v-belt snouts are
about 3/8" [~10mm] longer and need trimming or a spacer.  a '72-'80
12-weight crank is supposed to be smoother, especially for low-rpm
running, and stronger - but nobody on the strokers group has reported
any problems with the '81-up 4-weight crank.

258 main caps are beefier than the 4.0's, but you'd need to align bore
the block to use them and for a moderate stroker not really necessary.

'96-up 4.0s have a main girdle which mounts on studs sticking out from
the main bolts.  it's a drop-in for any 4.0 but you need a few washers
under the girdle to clear a 258 crank.
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen

adh@xxxxxxxxxxxxxxxxx                       and think what none thought