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The 1978 400 xx blocks were slightly changed from the "500557" casting used from mid 1975-1977. They are a somewhat beefier casting for use in the Trans am and Formula w-72 400s. They are considered stronger than the "557" block but weaker than 1967-1974 400s. For more info go to http://forums.performanceyears.com/forums/ (largest Pontiac info site on the web) and search for "blocks" in the race section. It has been discussed to death over the years.
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What transmission would be in my 1979 11-78 GM 3500 Van-Dura motor-home that has a small block 400 in it?
That would be a HEAVY DUTY 400 Turbo
How do you swap a 305 to a 400 in a 78 el camino?
The Chevrolet small block 400 will bolt in place of the 305 but be sure to use a 400 flywheel or flex plate. Do not use the 305 flywheel or flex plate on the 400.
Can a 350 small block hokk up to a 5 speed from a 4 silender?
It depends on the 4 cylinder it is out of. I know that my dad had a 4 speed in his 78 truck that was originally out of 78 Pontiac Sunbird.
What are the Pontiac 400 engine codes for the 1978 firebird?
poop ANSWER: Wow really intelligent response! Anyhow, they are as follows: 400/180hp Automatic: YA,YU (standard L-78 engine) 400/220hp Automatic: X7 (L78-W72 engine) 400/220hp Manual: WC (L78-W72 engine) There were also two block castings in 1978 the standard passanger car "500557" and the revised "XX481988". Some of the standard L78 cars also received the XX block, it was basicly luck of the draw. The L78-W72 cars are believed to have all gotten the revised (stronger) XX block casting.
What is factory rating for 78 400 El Camino?
The 400 wasn't available in the El Camino in '78.
What percent of 400 is 78?
19.5%
How old are you if 400 reduced by 2 times your age is 244?
400 - 2x = 244 Therefore, 2x = 400 - 244 = 156 Therefore, x = 156/2 = 78 Therefore, you would be 78 years old.
What is the value of 40078228416811927?
400 - 78 - 22 --84 - 16 - 81 - 19 - 27 = 400 - 78 - 22 + 84 - 16 - 81 - 19 - 27 = 241
How much horsepower does the 78 Trans Am have?
Depends on which engine it is. There were 3 basic options...California not included, for the 78 T/A. The entry level Pontiac 400 and Oldsmobile 403 were rated at around 185HP. You could also order a 200HP (maybe for 78 a 220HP) 400....which basically came with a little higher compression head. I know that the 220HP was offered for '79...but it's been a while since I've looked up those specs and do not remember if the '78 was 200 or 220.
How was 400 francs worth in 1890?
78$
What engines will fit in place of a 301cid in a 1979 Pontiac firebird?
im guessing a 350 but with a little work i would give it a big block 400 for the power.Any Pontiac engine from 1969-1979 will fit that Firebird. These would include 350,400, and 455 engines. They are all externally the same size as the 301 and will bolt up to your existing transmission. Anything earlier than 69 will not have the correct motor mount holes in the block. You'll need to use the engine/frame mounts that are on your 301. One other thing to consider, the other engines will be about 150 lbs heavier than that 301. You'll want to change to say the '78 T/A 400 front springs.
What engines fit 78 El Camino?
it should be any 4 bolt main small block, like a 305 350 383 400 327 you could even upgrade to a big block, but you may run into some trouble with engine mounts.
