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Found a 400 motor for sale...
Block code: 149369XH # by distributor: J098 4X Heads...these are the numbers I got from them: A2931 A2431 GM 8 I didn't see any 1H, 3H, 4H, or 7H....any help would be much appreciated, as I'm making the decision to buy or not!! Thanks!!! Darin 69 LeGTO- 350/350 soon to be 400/350! |
Found a 400 motor for sale...
Block code: 149369XH # by distributor: J098 4X Heads...these are the numbers I got from them: A2931 A2431 GM 8 I didn't see any 1H, 3H, 4H, or 7H....any help would be much appreciated, as I'm making the decision to buy or not!! Thanks!!! Darin 69 LeGTO- 350/350 soon to be 400/350! |
Disregard the 1 at the endof the head date...think that was an extra! So...27 views and no input yet...hmmm.
69 LeGTO- 350/350 soon to be 400/350! |
the block is october 68' and the heads are january 73'
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The heads as stated above are '73 model.
Do they have press in or screw in studs? Press in large valves they are 1H 114cc or 3H 98cc Small valves are 4H 98cc Screw in studs are large valve 7H 98cc Those are approx cc's and the 1H are the 455 heads. http://forums.performanceyears.com/g.../icon_wink.gif Greg |
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The 1H,etc. is stamped on the head.
Here is a pic. johnta1 Pontiac Power RULES !!! www.wallaceracing.com http://wallaceracing.com/johnta1plate.jpg |
Ahh ok. The Head ID number is cast into the center exhaust ports Jag. Those are I believe 1975 400 heads they are about 101 cc's if I remember correctly. Very similar in potential to a set of 6x's according to Dave at SD Performance.
Joe |
They are 4X 4H small valve heads...98cc. I'm assuming these would be OK on this motor for good low end??
69 LeGTO- 350/350 soon to be 400/350! |
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