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#1
08-06-2019, 01:13 PM
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914 Block is 4 engines at least
I forgot this Block was used for 2 bbl applications as well
Lots of 400's in 1970 ( these are Firebird, and Firebird HP ratings. ) All are drilled and tapped for 4 bolt main bearings. 400 Cu inch. 914 = 265 HP 2bbl 914 = 330 hp 914= 345 hp R/A III ( has 3 = 4 Bolt main caps) 914 = Modified the last digit of the casting number at engine plant to # 915= RA IV = 370 hp. ( has 3 = 4 Bolt main caps) >>> Other versions with DIFFERENT ratings were used in 1970 in other Pontiacs. |
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#2
08-06-2019, 01:51 PM
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yup, every 1970 model year 400 block was based off this casting.
for each application there is generally at least two codes, so (taking into account that the 400-2bbl in the Esprit was TH400 only) that's actually seven engines there... For a while I wanted a 1970 block to use for my intended 'pure stock' build, but the premium most seem to want because they have all magically become RAIII blocks, doesn't warrant it. I will probably build my 1972-WS block as a 1970-WS block 
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1970 Formula 400 Carousel Red paint on Black standard interior A no-engine, no-transmission, no-wheel option car. Quite likely one of few '70 Muncie three speed Formula 400's left. 1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing) 2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs) |
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