Roller Block with Magnum heads???

S'cuder said
This block is somewhat sought after for mid-level street builds. I'm looking for one, in good shape, local and reasonably priced. Although if someone wanted to ship one for free, that'd be fine. :rolleyes:
It is a roller cam 360, LA block. Still is drilled for oiling through the rocker shafts like all LAs, but has the cast in bosses for roller rockers like all Magnums. It was only used in the transition years like '89-'91. Good base to use for a stealthy stock parts hydraulic roller 408 dressed to look like a 340 at first glance. Big choice of heads and intakes available, but the new Trick Flow head has made this less of a selling point.

Yes, so this block I have 53006921 apparently I need to measure the oil filter boss to determine if it is a 1990 or a 1991 block? The casting date reads 3 10 90 which I believe is 3 day of October 1990, leads me to believe it is a 1991 block being cast that late in the year.
As ottmundr said in a post titled
1992 360LA block casting numbers

1989-’90
The 360 got a new block with three cast bosses in the valley for the roller lifter holddowns. Although all of these engines had fuel injection, they continued to use the cam with the long snout along with either the eccentric or the special cup-shaped washer. Both intermediate cam journals had holes to meter oil topside. The 318 and 360 cams are different and shouldn’t be interchanged. The most common block castings are 4315830 and 53006921. The later block (53006921) was used in ’91, too, so check the oil filter boss to see whether it’s a ’89-’90 or ’91 before using it for either application.

1991
This was the year of the corporate oil filter, so the 360 block was changed along with the 238 and the 318. The oil filter boss was 0.250" shorter so both the plate and adapter were modified accordingly. The rear main cap had a dowel pin and may or may not have the recess for the o-ring. The cap was still grooved for the rear pan seal. It had the old style ears for the motor mounts. The block was the 53006921 casting that was carried over from ’90, so once again you have to physically check the length of the filter boss to be sure if it fits a ’90 or ’91

So I guess if I put in flat hydraulic lifters and cam it would be the same as using a pre 1984 la block.
Reason I'd like to know is that I've had this block for 10 years but the valve train was shot, I had the block and heads magnafluxed the block checked out ok, but the heads were garbage, cracked in multiple areas. So I have a block I know is good and a set of magnum heads. Seems to me all I need to do is order new cam and oil through lifters (keeping with flat hydraulic, for cost reasons). Also are there oil through roller lifters? Then I guess this would be a great block with magnum heads and oil through roller lifters!? I'd gladly make a trade for an older la block for this one as I will not be using roller lifters anyway.