Join Date: Aug 2002
Thanked 0 Times in 0 Posts
FYI, the 266, 304, 345, 392 (IC and non-IC) all use DIFFERENT blocks. They are similar, but all different.
The 266/304 share the same overall physical size, just like the 345/392 do, but the block castings are different for each one.
The 266/304 have different bores, while the 304/345 have different strokes, and the 345/392 have different bores.
Thus, a 304 is a bored 266, the 345 is a stroked 304, and the 392 is a bored 345. You could also claim a 392 is a stroked n' bored 304.
Too bad the "bored" is a full 1/4"! And the "stroked" is somewhere around an inch as well. Thus you can't turn one into the other.
Any of the IH V8s seem to be a good choice for your typical Scout. My 1977 has had a 304 (before I got it), 196, stock '72 304, stock 345, and built 345 in it. The built 345 is a whole different monster from the stock 304, but the stock 304 ran just fine. I used the Scout (with 33s, 4.09s, and lift) to flat-tow my race Scout II long distances without a problem (as well as several other new-purchase Scout IIs). It would accelerate up a grade while towing a spare Scout behind it.
The fresh 345 just does all that and a little better - but it'll turn over 5,000rpm, cammed, more compression, ported heads, blah blah.
BUT.. as potent as my 345 seems to be.. I have a 304 that puts it to shame - built a little "more" by Gryphin Racing. It's setup for all-out racing though.. and to turn 6500rpm, and push out 350+hp and approaching 400ft-lbs.
of course, to make a 304 do that cost nearly double what it took to build the pretty-potent 345.
Bottom line - if I had a stock 304, would I swap it out to put a stock 345 in? If the 304 ran well, I probably wouldn't (I did this swap, but only after I burned up the 304).
A "built" motor is an entirely different debate.
Allan Ericson used his '68 Travelall with a 304 to pull a 30' Airstream travel trailer from Arizona to Fairplay, CO for RMIHR last year - and said the 304 did just fine up n' down the passes up to 10,000' elevation.