I wouldn't do it, if anything i would get involved with the heads you already have, you do realize that you have to go with a different intake with those heads
The angle of the bolts has nothing to do with the block as the intake doesn't bolt to the block.ramcharger_blue02 said:Well, the LA block isn't the same as a Magnum block. The bolts are in the wrong place. On the Mag they are vertical, and the LA they are slanted. Good luck, though
Don't do that, don't go backwards if anything forget that mag head and get a set of commando heads or something else, forget the stud mounted rockers and oiling thru the pushrods, forget heads altogether and just do alittle work in the heads you have now on your 89 and you will be happy.txs said:Just buy quality aftermarket hydraulic flat tappets and forget the roller lifters, all the companies make the pushrod oiling holes so they only have to stock one lifter that covers amc and mopar engines.
Thats not true. Marty you are so against the magnum head but know little about them. I knew little about them till recently. THEY ARE NOT STUD MOUNTED! They have blocks that bolt to the head and the rocker moves on that. Its not a ball pivot like the chevy's. The pivot on the magnum is that block that mounts firmly to the head. The rocker arms on the magnum head are more firmly mounted then the chevy stud design and better then the previous shaft mount design. the magnum design dont alow any side movement like the rocker shaft design does so more high rpm stability. I didn't know any of this till recently. Next thing is they flow way better then the X and J heads. LA engines have poor exhaust flow and the magnum head cures that. Better flow balance between cylinders and and better ratio flow between intake and exhaust. This is all fact so no need to bring this all out in a long debated discussion. The problem with magnum heads are they crack.Evildriver-3 said:Don't do that, don't go backwards if anything forget that mag head and get a set of commando heads or something else, forget the stud mounted rockers and oiling thru the pushrods, forget heads altogether and just do alittle work in the heads you have now on your 89 and you will be happy.txs said:Just buy quality aftermarket hydraulic flat tappets and forget the roller lifters, all the companies make the pushrod oiling holes so they only have to stock one lifter that covers amc and mopar engines.
Just out of curiosoty what gains do you think the mag head is gonna achieve as a bolt on, just so you know the mag flows worse than the x and j head in stock configuration and the RT mag head is good until .400 when it steadily drops off, the mag RT head is better only on the exhaust side, but then again were not talking about mag RT heads.
Do some work in the heads you have.