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10-10-2003, 12:51 AM
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#1 |
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Registered User
Join Date: Oct 2003
Posts: 5
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1970 402 Truck
hey all
ya, so i got the 1970 402/310hp engine in my car. it came from a c10 (?) so i guess you guys would know something about it. it was built in tonawanda and mated with a TH400. the head castings are 3975950. well, i deicded to swap a new cam in it because one of the lobe is flat, any idea on what compression my engine has? also, what cam do you think woudl work well with my heads? thanks alot! alan |
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10-10-2003, 01:13 AM
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#2 |
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Recovering 67-72 Addict
 
Join Date: Oct 2000
Location: North Bend, WA
Posts: 1,788
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My book says 9.0 to 1.0.
__________________
68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women" |
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10-10-2003, 01:27 AM
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#3 |
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Registered User
Join Date: Oct 2003
Posts: 5
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nice - i am thinking of a torker, 2800stall (i have both) and this cam (http://www.jegs.com/cgi-bin/ncommerc...78&prmenbr=361) i have 373 rear gears behind a th400. do you think it would work? if not - how about a XE274 (230/236 @ 050 duration)
thanks |
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10-10-2003, 08:44 AM
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#4 |
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2A674 Tank Rat
Join Date: Jul 2003
Location: Maryland Heights, Mo.
Posts: 626
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slpin - you have the same cast numbers as I do. My 402/310 is in my 70 GMC Sierra. As far as I have found the heads are oval port / open chamber type 76cc. I'm not sure how good this is though.
breeh - what book do you have for info on the motors? And is it still in print somewhere? Thanks
__________________
'92 GMC Sierra, Sportside, 2wd, 350, Black '92 Chevy Silverado Extended Cab 4 x 4, Blue USAFR = 2A674 = Aircraft Fuel Systems Maintenance i.e. Tank Rat |
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10-10-2003, 10:29 PM
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#5 | |
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Registered User
Join Date: Oct 2003
Posts: 5
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Quote:
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