The Chevy SB2 is the first purpose designed and built NASCAR motor GM ever made. It was used right up till 2008 in the nationwide series. The SB2 has now been fully replaced with the RO7, but is still widely used in drag racing and other motorsports.
for all out horsepower the splayed valve Chevy head, or the sb2 or 18 degree after that
Sb2(SO3)3
Sb2(SO4)3
I am searching for 409 chevy engine
No
Sometimes this website can be helpful for decoding chevy engine numbers: http://www.nastyz28.com/chevy-engine-code-stampings.php
Judging by the difference in restrictor plate size (smaller by 1/16" for Toyota for the Nationwide cars at Daytona this year, IIRC) and the performance seen on the track, I'd guess the Toyota's have about a 15-20 HP advantage over the non-R07 Chevy SB2 Nationwide NASCAR engines. The restrictor plate costs about 10 HP, yet the Toyota's were able to pass SB2 powered cars that use a larger restrictor plate. The Chevy Nationwide R07 is on a par with the Toyota Nationwide NASCAR engine in HP. The Chevy Nationwide R07 uses a restrictor plate the same size as the Nationwide Toyota. Whether this all will hold true with the Sprint Cup cars remains to be seen.
no
what year is my 350 chevy engine K1201KRH
What Chevy engine has the casting number 3970011?
SbCl3
The word you are looking for is interference not interface. The answer is no, the 4.3 liter Chevy is not an interference engine.