The small-block stands were also used in
the '73-'79 trucks with 351M/400 engines and will work just fine for
swapping a small-block into an earlier truck.
In case you're going to
start hitting NOS dealers or high-end salvage operations, the new part
numbers for the small-block stands are:
Note: When installing small-block
stands into a '67, '68 or early '69 truck, the front crossmember won't
be drilled for the lower attachment points on the engine perches, since
the small-block wasn't a factory offering until 'mid-'69. You'll have to
bolt up the perches up using the top holes and then drill the lower
holes, using the perch as a template.
6 - These are the I6 (300ci) engine perches from a '79 F150.
IMPORTANT: There's a rumor floating around that Ford redesigned the front crossmember for the '77½
through '79 2WD trucks, which also meant the engine perches had to be
redesigned, so these trucks couldn't be used as engine perch donors for
earlier trucks. However, while there were redesigns on stands in
'77½, it wasn't due to a change in the crossmember. (In fact, '79
6-cylinder trucks use a D4TZ (left) and a C5TZ (right) stand. That means
one stand never changed from inception!) The '79 trucks use a
D6TZ-5019-B frame front crossmember which is also the replacement for
'73-'78 and fits all F100/F150/F250 and F350 2WD with Twin I-beams.
- The FE stands were revised in '74 and have D4TZ numbers
- The 351M/400/small-block stands were revised in '77 (D7TZ numbers) but
are used as the replacement for all 73-79 Twin I-beam trucks
- The right-hand 6-cylinder stand for '74 was a D4TZ but was replaced in
'75 by the C6TZ right-hand, and then in '78 both 6-cylinder stands were
redesigned and had D8TZ numbers.
discontinued the 390 V8 in the F-100 in 1975 and both the 360 and 390 in
all light-duty trucks by 1976....except in CA, where you couldn’t get a
390 in an F100 after '73. Therefore, to install an FE into a '76-'79
truck you simply
use the I6 stands (Fig. 6) when doing this swap.