400 Chev block, 327 Chev crank, Ford 6 cyl rods, AFR (305
Chev) heads.
It's still sitting in my garage!
Steve: I am amazed and delighted that somebody in the GMC group built
the
engine! That was indeed the engine that interested me. Aside from the
misleading costs, what is the downside to the engine?
Vic,
The downside is that you can build a 383 stroker (350 block, 400
crank,) that will give you the same results for a heckuva lot less! I
have one that I built in my 72 Nova SS, I used Trick Flow heads on that
one. Car really gets with the program. I didn't mention that with the
aluminum heads, aluminum water pump and aluminum intake, there is an
additional weight reduction. (A bunch!)
One thing that can't be duplicated though, and one of the netters was
right on with his comments, is that with that short crank (327-307) and
those long Ford 6 cyl. rods, the piston dwell time at TDC was something
like 6 Deg. That, plus the quench properties of the AFR heads is why we
could not get that motor to detonate on crap gas with up to a 38 deg.
total lead. By the way, the +.030 overbore on the 400 block with the
piston & rod combo being what it is, equals 352 cu in. Good for mileage!
It's going in a '55 Chevy, someday. Right now I'm busy funneling all
our cash & time into that GMC so the '55 is just waiting it's turn.
Tomorrow is the GMC's inaugural voyage, we're heading for Sierra
Vista, AZ. Much, much trepidation.
Steve Ferguson
San Diego
Chev) heads.
It's still sitting in my garage!
Steve: I am amazed and delighted that somebody in the GMC group built
the
engine! That was indeed the engine that interested me. Aside from the
misleading costs, what is the downside to the engine?
Vic,
The downside is that you can build a 383 stroker (350 block, 400
crank,) that will give you the same results for a heckuva lot less! I
have one that I built in my 72 Nova SS, I used Trick Flow heads on that
one. Car really gets with the program. I didn't mention that with the
aluminum heads, aluminum water pump and aluminum intake, there is an
additional weight reduction. (A bunch!)
One thing that can't be duplicated though, and one of the netters was
right on with his comments, is that with that short crank (327-307) and
those long Ford 6 cyl. rods, the piston dwell time at TDC was something
like 6 Deg. That, plus the quench properties of the AFR heads is why we
could not get that motor to detonate on crap gas with up to a 38 deg.
total lead. By the way, the +.030 overbore on the 400 block with the
piston & rod combo being what it is, equals 352 cu in. Good for mileage!
It's going in a '55 Chevy, someday. Right now I'm busy funneling all
our cash & time into that GMC so the '55 is just waiting it's turn.
Tomorrow is the GMC's inaugural voyage, we're heading for Sierra
Vista, AZ. Much, much trepidation.
Steve Ferguson
San Diego
