I could be wrong, but my understanding was that the Chev 409 was used in medium and heavy duty Chev trucks and the 534 was used in Ford MDT/HDT.

I'm assuming that the Ford 534 might of been the better truck engine, due to it's significantly greater displacement which would give more torque than the 409, I'm guessing.

I'm also thinking that as the Ford was a purpose built truck engine and the Chevy 409 did double duty as a car and truck engine, that Ford would of had a chance to make sure that the 534 design could be pure truck.

But not having had any experience with either engine, I leave it to those, that know.

 

The 401-477-534 engines were truck only. Very large and heavy.

The 348/409 motors were truck/car engines. The 409 is very oversquare, in fact one of, if not the biggest bore/shortest stroke motor of it's time.
(4.3125 x 3.5)

This has almost all car and drag race info on the 348/409. Chev had a good thing going there for a while:

348 And 409 W-Engines - Chevy's First Big-Blocks - Super Chevy Magazine

Spec sheet here, 348 220 horse @ 4400, 325 torque @ 2600, 409 252 @4000, and 390 lb/ft @ 2400.

348/409 engine specifications

Shows this for series 80 and 60 trucks. The 60 is roughly equal to the F600 of the time, I think. Not sure about the 80, maybe the F700 or so.

quote from another posting, stay tuned:

"

<TABLE class=tborder id=post3306661 cellSpacing=1 cellPadding=6 width="100%" align=center border=0><TBODY><TR><TD class=alt2 style="PADDING-RIGHT: 0px; PADDING-LEFT: 0px; PADDING-BOTTOM: 0px; PADDING-TOP: 0px"><TABLE cellSpacing=6 cellPadding=0 width="100%" border=0><TBODY><TR><TD noWrap>Louisville Joe ******** type=text/javascript> vbmenu_register("postmenu_3306661", true); *********>
Senior User
</TD><TD width="100%"> </TD><!--<td width="100%" style="padding-left:25px;"></td>--><TD vAlign=top noWrap>Join Date: Jul 2004
Posts: 291



</TD></TR></TBODY></TABLE><!-- / user info --></TD></TR><TR><TD class=alt1 id=td_post_3306661><!-- message, attachments, sig --><!-- message --><TABLE width="100%" border=0><TBODY><TR><TD vAlign=top>I just found my 1962 Motor's truck manual. The 534 is listed as having 270 h.p. @ 3200 r.p.m., and 481 ft. lbs. @ 1900. The GMC 702 V-12 is listed at 275 h.p. @ 2400 r.p.m., and 630 ft. lbs. @ 1600 r.p.m.. The International 549 V-8 is listed at 256 h.p. @ 3200 r.p.m., and 505 ft. lbs. @ 2000 r.p.m.. Kind of fun looking at the spec.'s of those old monsters!
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The above from:

https://www.ford-trucks.com/forums/4...yone-else.html

So the 409 was probably in line with the 401 power wise.

Anyway, happy reading....